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| MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) PST7XXX Protection of Lithium-Ion Batteries (for Double-Protect) Monolithic IC PST7XXX Outline This IC is used for double-protection of lithium-ion batteries with one cell. Some models can also be used for pulse charging. Features 1. Detection voltage accuracy (Ta=25C) 2. Circuit current while on 3. Circuit current while off (Vcc at or below detection voltage) 4. Circuit current while off (Vcc=2.000V) 5. Output current while on 6. Delay time (Ctc=0.015F) 15 mV/30 mV 30A typ. 4A typ. 1A typ. -100A max. 200 ms typ. Package SOT-25 Applications IC for double-protection of lithium-ion batteries with one cell. Pin Assignment 1 5 4 2 3 1 2 3 4 5 SOT-25 Note 2 : The Pin 2 this product is SUB, so connect the pin to Ground. GND SUB TC VOUT VCC Block Diagram MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) PST7XXX Pin Description Pin No. 1 2 3 4 5 Pin Name GND SUB TC VOUT VCC GND pin SUB pin Delay time establish pin Reset signal output pin VCC pin / detection voltage pin Functions Absolute Maximum Ratings Item Storage temperature Operating temperature Supply voltage Allowable loss (Ta=25C) Symbol TSTG TOPR VCC max. Pd Ratings -40~+125 -25~+75 -0.3~+12 150 Unit C C V mW Recommended Operating Conditions Item Operating temperature Operating voltage Symbol TOPR VOP Ratings -25~+75 0~+12 Unit C V Electrical Characteristics Item Detection voltage Release voltage Hysteresis voltage Detection voltage temperature coefficient High-level output voltage Output leakage current Circuit current at on time Circuit current at off time 1 Circuit current at off time 2 Delay time "L" transmission delay time Output current at ON time Note : tPLH : VCC=3.870V tPHL : VCC=4.370V 4.370V 3.870V (Except where noted otherwise, Ta=25C) Measurement circuit 1 1 Symbol VSD VSR Vs Vs/ T VOH IOL ICCH ICCL1 ICCL2 tPLH* tPHL* IOH Measurement conditions VCC=L VCC=L H H RL=100k L RL=100k Min. Typ. Max. Unit 4.120 4.135 4.150 4.100 4.125 4.145 5 10 0.01 3.800 4.150 0.1 30 4 1 140 200 1.1 50 6 1.5 260 3.5 -100 20 V V mV %/C V A A A A mS mS A Vs=VSD-VSR 1 1 1 1 1 1 2 2 1 RL=100k Ta=-25~+75C VCC=4.20V RL=100k VCC=4.020V VCC=4.20V RL= VCC=4.02V RL= VCC=2.000V RL= RL=100k CTC=0.015F RL=100k CTC=0.015F VCC=4.200V RL=0 MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) PST7XXX Measuring Circuit (1) (2) A: DC Amperemeter V: DC Voltmeter CRT: Oscilloscope Input Pulse Vsd typ.+0.25V Vsr typ.-0.25V 0V MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) PST7XXX Timing Chart Vsd VCC Vs TC tPLH VCC tPLH 0.4V max. VOUT tPLH tPLH Application Circuit (1) Over charge detecting circuit (P-MOS FET control) MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) PST7XXX (2) Over charge detecting circuit (N-MOS FET control) Characteristics Delay time (tPLH) - CTC characteristics 10 L transmission delay time (tPHL) CTC characteristics 100 tPLH (S) tPLH (mS) 0.001 0.01 0.1 1 1 0.1 0.01 0.0001 10 1 CTC (F) 0.1 0.0001 0.001 0.01 0.1 1 CTC (F) Delay time (tPLH) . .13.33 CTC (S) = CTC: F "L" Transmission delay time (tPHL) . .73.35 10-3 CTC (S) = CTC: F Note: The above are representative, not guaranteed values. |
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