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?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 1 of 12 enerchip cc with integrated power management enerchip? cc cbc3105 features ? power manager with charge control ? integrated 5ah solid state battery ? built-in energy storage protection ? temperature compensated charge control ? adjustable switchover voltage ? charges enerchip over a wide supply range ? low standby power ? smt - lead-free refow tolerant ? thousands of recharge cycles ? low self-discharge ? eco-friendly, rohs compliant - tested the enerchip cc is the worlds frst intelligent thin film energy storage device. it is an integrated solution that provides backup energy storage and power management for systems requiring power bridging and/or secondary power. a single enerchip cc can charge up to 10 additional enerchips connected in parallel. during normal operation, the enerchip cc charges itself with a controlled voltage using an internal charge pump that operates from 2.5v to 5.5v. an enable pin allows for activation and deactivation of the charge pump using an external control line in order to minimize current consumption and take advantage of the fast recharge time of the enerchip. when the primary power supply dips below a user- defned threshold voltage, the enerchip cc will signal this event and route the enerchip voltage to v out . the enerchip cc also has energy storage protection circuitry to enable thousands of recharge cycles. the cbc3105-r4c is a 16-pin, 4mm x 5mm dual flat no-lead (dfn) package, available in tubes, trays, or tape-and-reel for use with automatic insertion equipment. 4mm x 5mm x 0.9mm dfn smt package applications ? standby supply for non-volatile sram, real-time clocks, controllers, supply supervisors, and other system-critical components. ? wireless sensors and rfid tags and other powered, low duty cycle applications. ? localized power source to keep microcontrollers and other devices alert in standby mode. ? power bridging to provide back-up power to system during exchange of main batteries. ? consumer appliances that have real-time clocks; provides switchover power from main supply to backup battery. ? business and industrial systems such as: network routers, point-of-sale terminals, single- board computers, test equipment, multi-function printers, industrial controllers, and utility meters. ? energy harvesting by coupling the enerchip with energy transducers such as solar panels. figure 1: typical enerchip cc application circuit cbc3105 preliminary enerchip ? cbc3105-r4c
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 2 of 12 electrical properties enerchip backup output voltage: 3.3v energy capacity (typical): 5ah recharge time to 80%: 10 minutes charge/discharge cycles: >5000 to 10% discharge physical properties package size: 4mm x 5mm operating temperature: -20c to +70c storage temperature: -40c to +125c functional block diagram figure 2: enerchip cc cbc3105 internal block diagram the enerchip cc internal schematic is shown in figure 2. the input voltage from the power supply (vdd) is applied to the charge pump, the control logic, and is compared to the user-set threshold as determined by the voltage on vmode. vmode is an analog input ranging from 0v to vdd. the enable pin is a digital input that turns off the charge pump when low. vout is either supplied from vdd or the integrated enerchip. reset is a digital output that, when low, indicates vout is being sourced by the integrated enerchip. cfly is the fying capacitor in the voltage doubler circuit. the value of c fly can be changed if the output impedance of the enerchip cc needs to be modifed. the output impedance is dictated by , where is the frequency of oscillation (typically 100khz) and is the capacitor value (typically 0.1f). gnd is system ground. enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 3 of 12 pin number(s) label description 1 vbat- negative enerchip terminal - tie to system ground 2 nc no connection 3 vmode mode select for backup switchover threshold 4 gnd system ground 5 vout system voltage 6 cp flying capacitor positive 7 cn flying capacitor negative 8 nc no connection 9 reset reset signal (active low) 10 enable charge pump enable 11 nc no connection 12 vdd input voltage 13 nc no connection 14 vchg enerchip charge voltage - tie to pin 16 and/or optional enerchip(s) 15 nc no connection 16 vbat+ positive enerchip terminal - tie to pin 14 cbc3105-r4c input/ouput descriptions figure 3: enerchip cc cbc3105 package pin-out 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 vbat- nc vmode gnd vout cp cn nc vbat+ nc vchg nc vdd nc enable reset/ top view enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 4 of 12 absolute maximum ratings parameter condition min typical max units output voltage v out v dd > v th - v dd - v output voltage v out (backup mode) v dd < v th 2.2 3.3 3.6 v enerchip pulse discharge current - variable - see app. note 1025 - self-discharge (5 yr average) non-recoverable - 2.5 - % per year recoverable - 1.5 (1) - % per year operating temperature - -20 25 +70 c storage temperature - -40 - +125 (2) c cell resistance (25c) charge cycle 2 - 7 11 k? charge cycle 1000 - 31 48 recharge cycles (to 80% of rated ca - pacity; 4.1v charge voltage) 25c 10% depth-of-discharge 5000 - - cycles 50% depth-of discharge 1000 - - cycles 40c 10% depth-of-discharge 2500 - - cycles 50% depth-of-discharge 500 - - cycles recharge time (to 80% of rated capacity; 4.1v charge; 25c) charge cycle 2 - 11 22 minutes charge cycle 1000 - 45 70 capacity 40na discharge; 25c 5 - - ah (1) first month recoverable self-discharge is 5% average. (2) storage temperature is for uncharged enerchip cc device. note: all specifcations contained within this document are subject to change without notice. parameter condition min typical max units v with respect to gnd 25c gnd - 0.3 - 6.0 v enable and v mode input voltage 25c gnd - 0.3 - v +0.3 v v bat (1) 25c 3.0 - 4.15 v v chg (1) 25c 3.0 - 4.15 v v out 25c gnd - 0.3 - 6.0 v reset output voltage 25c gnd - 0.3 - v +0.3 v cp, flying capacitor voltage 25c gnd - 0.3 - 6.0 v cn 25c gnd - 0.3 - v +0.3 v operating characteristics (1) no external connections to these pins are allowed, except parallel enerchips. enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 5 of 12 power supply current characteristics t a = -20 oc to +70oc characteristic symbol condition min max units quiescent current i q enable=gnd v dd =3.3v - 3.5 a v dd =5.5v - 6.0 a enable=v dd v dd =3.3v - 35 a v dd =5.5v - 38 a enerchip cutoff current i qbatoff v bat < v batco , v out =0 - 0.5 na i qbaton v bat > v batco , enable=v dd , i out =0 - 42 na interface logic signal characteristics v dd = 2.5v to 5.5v, t a = -20 oc to +70oc characteristic symbol condition min max units high level input voltage v ih - v dd - 0.5 - volts low level input voltage v il - - 0.5 volts high level output voltage v oh v dd >v th (see figures 4 and 5) i l =10a v dd - 0.04v (1) - volts low level output voltage v ol i l = -100a - 0.3 volts logic input leakage current i in 0 ?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 6 of 12 charge pump characteristics v dd = 2.5v to 5.5v, t a = -20 oc to +70oc characteristic symbol condition min max units enable=v dd to charge pump active t cpon enable to 3rd charge pump pulse, v dd =3.3v 60 80 s enable falling to charge pump inactive t cpoff - 0 1 s charge pump frequency f cp - 120 khz (1) charge pump resistance r cp delta v bat , for i bat charging current of 1a to 100a c fly =0.1f, c bat =1.0f 150 300 ? v chg output voltage v cp c fly =0.1f, c bat =1.0f, i out =1a, temp=+25oc 4.075 4.125 v v chg temp. coeffcient t ccp i out =1a, temp=+25oc -2.0 -2.4 mv/oc charge pump current drive i cp i bat =1ma c fly =0.1f, c bat =1.0f 1.0 - ma charge pump on voltage v enable enable=v dd 2.5 - v (1) f cp = 1/t cpper additional characteristics t a = -20 oc to +70oc characteristic symbol condition limits units min max v bat cutoff threshold v batco i out =1a 2.75 3.25 v cutoff temp. coeffcient t cco - +1 +2 mv/oc v bat cutoff delay time t cooff v bat from 40mv above to 20mv below v batco i out =1a 40 - ms v out dead time, v dd rising (2) t rsbr i out =1ma v bat =4.1v 0.2 2.0 s v out dead time, v dd falling (2) t rsbf v bat =4.1v 0.2 2.0 s bypass resistance r out - - 2.5 ? (2) dead time is the time period when the v out pin is foating. size the holding capacitor accordingly. note: all specifcations contained within this document are subject to change without notice enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 7 of 12 figure 4: enerchip cc switchover and disconnect timing diagrams important timing diagrams for the enerchip cc relationship between enerchip switchover timing and enerchip disconnect from load timing are shown in figure 4. enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 8 of 12 figure 5: timing diagrams for v dd to reset and enable to charge pump active. timing diagrams for the enerchip cc relationship between v dd to reset and enable high to charge pump becoming active are shown in figure 5. enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 9 of 12 enerchip cc detailed description the enerchip cc uses a charge pump to generate the supply voltage for charging the integrated energy storage device. an internal fet switch with low rds on is used to route v dd to v out during normal operation when main power is above the switchover threshold voltage. when v dd is below the switchover threshold voltage, the fet switch is shut off and v out is supplied by the enerchip. an interrupt signal is asserted low prior to the switchover. operating modes the enerchip cc can be operated from various power supplies such as a primary source or a non-rechargeable battery. with the enable pin asserted high, the charge pump is active and charges the integrated enerchip. the enerchip cc will be 80% charged within 10 minutes. due to the rapid recharge it is recommended that, once the enerchip cc is fully charged, the user de-assert the enable pin (i.e., force low) to reduce power consumption. a signal generated from the mcu could be used to enable and disable the enerchip cc. when controlling the enable pin by way of an external controller - as opposed to fxing the enable line to vdd - ensure that the enable pin is forced low by the controller anytime the reset line is low, which occurs when the switchover threshold voltage is reached and the device is placed in backup mode. although the internal charge pump is designed to operate below the threshold switchover level when the enable line is active, it is recommended that the enable pin be forced low whenever reset is low to ensure no parasitic loads are placed on the enerchip while in this mode. if enable is high or foating while vdd is in an inde terminate state, bias currents within the enerchip cc could fow, placing a parasitic load on the enerchip that could dramatically reduce the effective backup operating time. the enerchip cc supports 2 operational modes as shown in figures 6 and 7. mode 1 operation for use in 3.3 volt systems. the v mode pin should be tied directly to gnd, as shown in figure 6. this will set the switchover threshold at approximately 3.0 volts. figure 6: cbc3105 typical circuit for mode 1 operation enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 10 of 12 figure 7: cbc3105 typical circuit for mode 2 operation mode 2 operation figure 7 shows the circuitry for user-selectable switchover threshold to a value between 2.5 and 5.0 volts. use figure 8 to determine the value of r1. to determine the amount of hysteresis from the enerchip switchover threshold, use figure 9. to determine the backup switchover hysteresis for mode 2 operation, use figure 9. figure 8: mode 2 resistor selection graph figure 9: mode 2 hysteresis as a function of r2/r1 battery switchover threshold voltage vs. r2/r1 ratio 0 1 2 3 4 5 6 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 r2/r1 ratio switchover threshold voltage (volts) trip point hysteresis in battery switchover threshold voltage vs. r2/r1 ratio 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 r2/r1 ratio hysteresis (volts) hysteresis enerchip charging and backup power switchover threshold for 2.5 to 5.5 volt operation is selected by changing the value of r2 (see figure 7). to determine the backup switchover point, set the value of r1 to 200k ? and choose the value of r2 according to figure 8. for example, to set a 3.0v trip point: if r1=200 k ? then r2 = r1 x 0.72 = 144k ? . figure 7 shows a mode 2 circuit with standard value resistors of 200k ? and 143k ? . enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 11 of 12 real-time clock application circuit the enerchip cc as depicted in figure 10 is a typical application circuit in a 3.3 volt system where backup and power switchover circuitry for a real-time clock device is provided. figure 10: enerchip cc providing backup power for rtc with spi bus cbc3105-r4c evaluation board the cbc3105-r4c evaluation board as shown in the photo and schematic below is included in the cbc-eval- 05b enerchip cc evaluation kit. this board is 16 pins in the same 24-pin dip confguration as the eval- 05 cbc3150/cbc3112 eval board. this eval board is easy to use with proto-boards or sockets for design evaluation. note that the enerchip cbc3105 is shipped in a charged state and it is advised to not solder the cbc3105 evaluation board to another board as the high temperatures of a manual soldering process are outside the cbc3105 operating specifcations. figure 11: cbc3105-r4c evaluation board figure 12: cbc3105-r4c eval board pin-out enerchip cc cbc3105 preliminary
?2012 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-21 rev e page 12 of 12 cbc3105-r4c 4mm x 5mm x 0.9mm dfn package drawing cymbet, the cymbet logo, and enerchip are cymbet corporation trademarks disclaimer of warranties; as is the information provided in this data sheet is provided as is and cymbet corporation disclaims all representations or warranties of any kind, express or implied, relating to this data sheet and the cymbet enerchip product described herein, including without limitation, the implied warranties of merchantability, ftness for a particular purpose, non-infringement, title, or any warranties arising out of course of dealing, course of performance, or usage of trade. cymbet enerchip products are not authorized for use in life critical applications. users shall confrm suitability of the cymbet enerchip product in any products or applications in which the cymbet enerchip product is adopted for use and are solely responsible for all legal, regulatory, and safety-related requirements concerning their products and applications and any use of the cymbet enerchip product described herein in any such product or applications. ordering information enerchip cc part number description notes cbc3105-r4c enerchip cc 5ah in 16-pin dfn shipped in tube cbc3105-r4c-tr1 cbc3105-r4c-tr5 enerchip cc 5ah in 16-pin dfn tape-and-reel - 1000 pcs (tr1) or 5000 pcs (tr5) per reel cbc3105-r4c-wp enerchip cc 5ah in 16-pin dfn waffe pack CBC-EVAL-05B enerchip cc eval kit contains cbc3105 eval board dimensions in mm [inches]. u.s. patent no. 8,144,508. additional u.s. and foreign patents pending enerchip cc cbc3105 preliminary

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