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L6370
2.5A high-side driver industrial intelligent power switch
Features

2.5A output current 9.5V to 35V supply voltage range Internal current limiting Thermal shutdown Open ground protection Internal negative voltage clamping to VS - 50V for fast demagnetization Differential inputs with large common mode range and threshold hysteresis Undervoltage lockout with hysteresis Open load detection Two diagnostic outputs Output status led driver Non dissipative short circuit protection Protection against and surge transient (IEC 61000-4-5) Immunity against burst transient (IEC 61000-4-4) ESD protection (human body model 2kV)
PowerSO-20
Description
The L6370 is a monolithic Intelligent Power Switch in Multipower BCD Technology, for driving inductive or resistive loads. An internal Clamping Diode enables the fast demagnetization of inductive loads. Diagnostic for CPU feedback and extensive use of electrical protections make this device extremely rugged and specially suitable for industrial automation applications.
Table 1. Device summary
Part number L6370D L6370D013TR Op. Temp. range, C -25 to +85 -25 to +85 Package PowerSO-20 PowerSO-20 Packaging Tube Tape & Reel
June 2007
Rev 7
1/19
www.st.com 19
Contents
L6370
Contents
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 2.2 2.3 2.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 AC operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 3.2 3.3 3.4 3.5 3.6 3.7 Diagnostic truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Diagnostic logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Short circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Overtemperature protection (OVT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Undervoltage protection (UV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Demagnetization of inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 4.2 PowerSO-20 mechanical data & package dimensions . . . . . . . . . . . . . . . 14 PowerSO-20 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2/19
L6370
Block diagram and pin description
1
Block diagram and pin description
Figure 1. Block diagram
VS UNDER VOLTAGE INPUT CHARGE PUMP
IN+ IN-
+ DRIVER OUT NON DISSIPATIVE SHORT CIRCUIT CURRENT LIMITATION OPEN LOAD DETECTION OUTSTATUS DIAG1 DIAGNOSTIC
1.4V
RSC
ON-DELAY
OSC
THERMAL PROTECTION DIAG2 3mA
OUTPUT STATUS
D95IN208D
Figure 2.
Pin connection (top view)
GND OUTPUT OUTPUT ON-DELAY SUPPLY VOLTAGE SUPPLY VOLTAGE N.C. OUTPUT OUTPUT GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
GND OUTPUT STATUS INPUT INPUT + N.C. DIAGNOSTIC 2 DIAGNOSTIC 1 RSC N.C. GND
D95IN210B
PowerSO-20
Note: Output pins must be connected externally to the package to use all leads for the output current (Pin 2, 3, 8 and 9 for PowerSO20 package).
3/19
Block diagram and pin description
L6370
1.1
Pin description
Table 2.
Pin N 14 15 18 17 19 1, 10, 11, 20 4 13 8, 9 5, 6
Pin description
Pin name DIAG1 DIAG2 ININ+ OUTSTATUS Function DIAGNOSTIC 1 output. This open drain reports the IC working conditions. (See Diagnostic truth Table 7) DIAGNOSTIC 2 output. This open drain reports the IC working conditions. (See Diagnostic truth Table 7) Comparator non inverting input Comparator inverting input This current source output is capable of driving a LED to signal the status of the output pin. The pin is active (source current) when the output pin is considered high (See Figure 3) Ground Programmable ON time interval duration during short circuit operation Current limitation setting. High Side output with built-in current limitation Supply Volatge Input, the value of the supply voltage is monitored to detect under voltage condition
GND ON-DELAY RSC OUTPUT VS
4/19
L6370
Electrical specifications
2
2.1
Electrical specifications
Absolute maximum ratings
Table 3.
Symbol VS VS- VO Vod Iod Vi Vi Ii IO PTOT TOP TSTG EI
Absolute maximum ratings
Parameter Supply Voltage (TW< 10ms) Supply to Output Differential Voltage. See also VCl Externally Forced Voltage Externally Forced Voltage Input Voltage Differential Input Voltage Input Current Output Current . See also ISC Power Dissipation. See also Thermal Characteristics. Operating Temperature Range (Tamb) Storage Temperature Energy Induct. Load TJ= 85C Value 50 internally limited -0.3 to 7 +1 -10 to VS+10 43 20 internally limited internally limited -25 to +85 -55 to 150 1 Unit V V V mA V V mA A W C C J
2.2
Thermal data
Table 4.
Symbol RthJC RthJA
Thermal data
Description Thermal Resistance Junction to case Max. Value 1.5 C/W Thermal Resistance Junction to ambient Max. Unit
5/19
Electrical specifications
L6370
2.3
Table 5.
Symbol Vsmin Vs Iq Vsth1 Vsth2 Vsth3 Isc
Electrical characteristics
Electrical characteristics (VS = 24V; TJ = -25 to +125C, unless otherwise specified)
Parameter Supply Voltage for Valid Diagnostics Supply Voltage (operative) Quiescent Current Iout = Ios = 0 Undervoltage Threshold 1 Undervoltage Threshold 2 Supply Voltage Hysteresis VS = 9.5 to 35V; RL= 2 5k< RSC< 30k 0< RSC< 5k Iout = 2.0A Tj = 25C Tj = 25C Tj = 25C Tj = 25C 2.6 Vil Vih (See Figure 3), Tamb = 0 to +85C 8.5 8 300 Test condition Idiag> 0.5mA ; Vdg1= 1.5V Min. 4 9.5 24 0.8 3 9 8.5 500 15/RSC(k) 3.2 200 320 250 400 4 280 440 350 550 500 0.8 48 1 -7 -250 0.8 50 400 150 +Ii -Ii +Ii -Ii +Ii -Ii -20 -75 -250 -100 -50 +20 -25 +10 -125 -30 -15 +50 A 1.4 53 3 1.5 58 6 15 250 2 400 Typ. Max. 35 35 1.4 4 9.5 9 700 Unit V V mA V V mV A A mV mV A V V mA V A V mV K
Short Circuit Current
Vdon
Output Voltage Drop Iout = 2.5A Output Leakage Current Low State Out Voltage Internal Voltage Clamp (VS- VO) Open Load Detection Current Common Mode Input Voltage Range (Operative) Input Bias Current Input Threshold Voltage Input Threshold Hysteresis Voltage Diff. Input Resistance Vi = Vil; Vo = 0V Vi = Vil; RL =
Ioslk Vol Vcl Iold Vid Iib Vith Viths Rid
IO = 1A Single Pulsed: Tp = 300s Vi = Vih; Tamb = 0 to +85C VS = 18 to 35V Vi = -7 to 15V; -In = 0V V +In > V -In V +In > V -In 0 < +In < +16V ; -In = 0V -7 < +In < 0V ; -In = 0V V +In = V -In 0V < Vi < 5.5V
Iilk
Input Offset Current
-In = GND 0V < V+In <5.5V +In = GND 0V < V-In <5.5V
6/19
L6370 Table 5.
Symbol Voth1 Voth2 Vohys Iosd Vosd Ioslk Vdgl Idglk
Electrical specifications Electrical characteristics (continued) (VS = 24V; TJ = -25 to +125C, unless otherwise specified)
Parameter Output Status Threshold 1 Voltage Output Status Threshold 2 Voltage Output Status Threshold Hysteresis Output Status Source Current Active Output Status Driver Drop Voltage Output Status Driver Leakage Current Diagnostic Drop Voltage Diagnostic Leakage Current Vout > Voth1; Vos = 2.5V Vs - Vos; Ios = 2mA Tamb = 0 to +85C Vout < Voth2; Vos = 0V VS = 9.5 to 35V D1 / D2 = L ; Idiag= 0.5mA D1 / D2 = L ; Idiag= 3mA D1 / D2 = H ; 0 < Vdg < Vs VS = 9.5 to 35V 40 250 5 (See Figure 3) Test condition Min. 4.5 4 300 2 1.5 Typ. 5 4.5 500 Max. 5.5 5.0 700 4 3 25 Unit V V mV mA V A mV A
Source drain NDMOS diode Vfsd Ifp trr tfr Forward On Voltage Forward Peak Current Reverse Recovery Time Forward Recovery Time @ Ifsd = 2.5A t = 10ms; d = 20% If = 2.5A di/dt = 25A/s 200 100 1 1.5 6 V A ns ns
Thermal characteristics Lim TH Junction Temp. Protect. Thermal Hysteresis 135 150 20 C C
Note:
Vil 0.8V, Vih 2V @ (V+In > V-In)
7/19
Electrical specifications
L6370
2.4
Table 6.
Symbol tr - t f td dV/dt tON tOFF fmax
AC operation
AC operation
Parameter Rise or Fall Time Delay Time Slew Rate (Rise and Fall Edge) On time during Short Circuit Condition Of time during hort Circuit Condition Maximum Operating Frequency 50pF < CDON < 2nF 0.7 Test condition VS = 24V; RI = 70; Rl to ground Min. Typ. 20 5 1 1.28 64 25 1.5 Max. Unit s s V/s s/pF tON KHz
8/19
L6370
Circuit description
3
Circuit description
Figure 3. Output status hysteresis
Vshys
Voth2
Voth1
D95IN211A
VOUT
Figure 4.
Undervoltage comparator hysteresis
Vshys
Voth1
Voth2
D95IN212
Vs
Figure 5.
Switching waveforms
Vin
50%
50%
td Vout 90% 50% 10% tr
td
t
90% 50% 10% tf
D94IN127A
t
9/19
Circuit description
L6370
3.1
Diagnostic truth table
Table 7. Diagnostic truth table
Diagnostic conditions Normal Operation Open Load Condition (Io< Iold) Short to VS Short Circuit to Ground (IO = ISC) (1) (pin ON-DELAY grounded) Output DMOS Open Overtemperature Supply Undervoltage (VS< Vsth2) Input L H L H L H H L L H L H L H Output L H L H H H X L L L L L L L Diag1 H H H L L L H H H L H H L L Diag2 H H H H H H H H H H L L L L
1. A cold lamp filament, or a capacitive load may activate the current limiting circuit of the IPS, when the IPS is initially turned on.
3.2
Input section
The input section is an high impedance differential stage with high common and differential mode range. There's built-in offset of +1.4V (typical value) and an hysteresis of 400mV (maximum value), to ensure high noise immunity.
3.3
Diagnostic logic
The operating conditions of the device are permanently monitored and the following occurences are signalled via the DIAG1/DIAG2 open-drain output pins: - Short Circuit versus ground. A current limiting circuit fixes at Isc = 3.2A (typical value) the maximum current that can be sourced from the OUTPUT pin (for more details see short circuit operation section). Short Circuit versus Vs. Under Voltage(UV) Over Temperature (OVT) Open Load, if the output current is less than 3mA (typical value). Output DMOS Open according to the diagnostic Truth Table 7
- - - - -
10/19
L6370
Circuit description
3.4
Short circuit operation
In order to minimise the power dissipation when the output is shorted to grounded, an innovative, non dissipative short cicuit protection (patent pending) is implemented, avoiding, thus the intervention of the thermal protection in most cases. Whenever the output is shorted to ground, or, generally speaking, an over current is sinked by the load, the output devices is driven in linear mode, sourcing the Isc current (typically 3.2A) for a time interval (ton) defined by means of the external CON capacitor connected between the ONDELAY pin and GND. Whether the short circuit crease within the ton interval the DIAG2 output status is not affected, acting as a Programmable Diagnostic Delay. This function allow the device to drive a capacitive load or a filament lamp (that exhibits a very low resistance during the initial heading phase) without the intervention of the diagnostic. If the short circuit lasts for the whole tON interval, the output DMOS is switched OFF and the DIAG2 goes low, for a time interval tOFF lasting 64 times tON. At the end of the tOFF interval if the short circuit condition is still present, the output DMOS is turned ON (and the DIAG2 goes high - see Figure 7) for another tON interval and the sequence starts again, or, whether not, the normal condition operation is resumed. The tON interval can be set to lasts between 64ms and 2.56ms for a CON capacitor value ranging between 50pF and 2nF to have: tON (s) = 1.28 CON (pF) If the ON-DELAY pin is grounded the non dissipative short circuit protection is disabled, and the Isc current is delivered until the Overtemperature Protection shuts the device off. The behaviour of the DIAG2 output is, in this situation, showed in the Diagnostic Truth Table 7.
3.5
Overtemperature protection (OVT)
If the chip temperature exceeds Qlim (measured in a central position in the chip) the chip deactivates itself. The following actions are taken: all the output stage is switched off; the signal DIAG2 is activated (active low). Normal operation is resumed as soon as (typically after some seconds) the chip temperature monitored goes back below lim-H. The different thresholds with hysteretic behavior assure that no intermittent conditions can be generated.
3.6
Undervoltage protection (UV)
The supply voltage is expected to range from 9.5V to 35V, even if its reference value is considered to be 24V. In this range the device operates correctly. Below 9.5V the overall system has to be considered not reliable. Protection will thus shut off the output whenever the supply voltage falls below the mask fixed by the Vsth1(9V typ.) and Vsth2 (8.5V typ.).
11/19
Circuit description
L6370
The hysteresis (see Figure 4) ensures a non intermittent behavior at low supply voltage with a superimposed ripple. The Under Voltage status is signalled via the DIAG1 and DIAG2 outputs (see the Diagnostic Truth Table 7) .
3.7
Demagnetization of inductive loads
An internal zener diode, limiting the voltage across the Power MOS to between 50 and 60V (Vcl), provides safe and fast demagnetization of inductive loads without external clamping devices. The maximum energy that can be absorbed from an inductive load is specified as 1J (at Tj = 85C) (see Figure 4). Figure 6. L6370 short circuit operation waveforms
Figure 7.
Inductive load equivalent circuit
+VS
IS 50V VS OUTPUT
IO RL
D95IN215A
L
12/19
L6370
Package mechanical data
4
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com
13/19
Package mechanical data
L6370
4.1
PowerSO-20 mechanical data & package dimensions
Figure 8. PowerSO-20 mechanical data & package dimensions
mm MIN. 0.1 0 0.4 0.23 15.8 9.4 13.9 1.27 11.43 10.9 5.8 0 15.5 0.8 11.1 2.9 6.2 0.1 15.9 1.1 1.1 0.031 8(typ.) 8(max. ) 10 0.394 0.228 0.000 0.610 0.429 TYP. MAX. 3.6 0.3 3.3 0.1 0.53 0.32 16 9.8 14.5 0.000 0.016 0.009 0.622 0.370 0.547 0.050 0.450 0.437 0.114 0.244 0.004 0.626 0.043 0.043 JEDEC MO-166 0.004 MIN. inch TYP. MAX. 0.142 0.012 0.130 0.004 0.021 0.013 0.630 0.386 0.570
Weight: 1.9gr
DIM. A a1 a2 a3 b c D (1) D1 (2) E e e3 E1 (1) E2 E3 G H h L N S T
OUTLINE AND MECHANICAL DATA
(1) "D and E1" do not include mold flash or protusions. - Mold flash or protusions shall not exceed 0.15mm (0.006") - Critical dimensions: "E", "G" and "a3". (2) For subcontractors, the limit is the one quoted in jedec MO-166
PowerSO-20
N
N a2 b e A
R
c DETAIL B a1 E DETAIL A
DETAIL A e3 H
lead
D a3 DETAIL B
20 11
Gage Plane 0.35
slug
-C-
S E2 T E1 BOTTOM VIEW
L
SEATING PLANE G C
(COPLANARITY)
E3
1 1 0
h x 45
PSO20MEC
D1
0056635 I
14/19
L6370
Package mechanical data
4.2
PowerSO-20 packing information
Figure 9. PowerSO-20 tube shipment information
TUBE MECHANICAL DATA mm. A B C D E F G H I J K L M N BASE QUANTITY BULK QUANTITY 31 pcs. 310 pcs. 18.80 17.2 0.2 8.20 0.2 10.90 0.2 2.90 0.2 0.40 0.80 6.30 4.30 0.2 3.7 0.2 9.4 0.40 0.80 3.50 0.2 inch 0.740 0.677 0.008 0.323 0.008 0.429 0.008 0.114 0.008 0.016 0.031 0.248 0.165 0.008 0.146 0.008 0.370 0.016 0.031 0.138 0.008
15/19
Package mechanical data Figure 10. PowerSO-20 tape shipment specification
L6370
TAPE MECHANICAL DATA mm. D E Po T max. D1 min. F K max. P2 R W P1 Ao, Bo, Ko BASE QUANTITY BULK QUANTITY 1.50 +0.1/0 1.75 0.1 4.00 0.1 0.40 1.50 11.5 0.05 6.50 2.00 0.1 50 24.00 0.30 24.00 0.05 min to 1.0 max. 600 pcs. 600 pcs. inch 0.059 +0.004/0 0.069 0.004 0.157 0.004 0.016 0.059 0.453 0.002 0.256 0.079 0.004 1.968 0.945 0.012 0.945 0.002 min to 0.039 max.
16/19
L6370 Figure 11. PowerSO-20 reel shipment specification
Package mechanical data
T 40mm (1.575in) min. access hole at slot location
B
C A D
N
Full radius
G measured at hub
Tape slot in core for tape start 2.5mm (0.098in) min. width
REEL MECHANICAL DATA mm. Tape size A max. B min. C D min. N min. G T max. 24.0 0.30 330.0 1.5 13.0 0.20 20.2 60 24.4 +2/-0 30.4 inch 0.945 0.012 12.992 0.059 0.512 0.008 0.795 2.362 0.960 +0.079/-0 1.197
Figure 12. Footprint recommended data
FOOTPRINT DATA mm. A B C D E F G 9.5 14.7-15.0 12.5-12.7 6.3 0.64 0.71 1.27 inch 0.374 0.579-0.591 0.492-0.500 0.248 0.026 0.028 0.050
17/19
Revision history
L6370
5
Revision history
Table 8.
Date 10-Aug-2003 12-Dec-2005 26-Apr-2006 19-Feb-2007 19-Jun-2007
Revision history
Revision 3 4 5 6 7 Initial release. Applied new Look & Feel Style Sheet. Added L6370D013TR part number. Updated Package and Packing section. Document has been reformatted Typo in Figure 2 on page 3. Truth table updated, deleted Multiwatt mechanical information Changes
18/19
L6370
Revision history
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