MITSUMI PST7XXX

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