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參數(shù)資料
| 型號(hào)： | MC33348 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | LITHIUM BATTERY PROTECTION CIRCUIT FOR ONE CELL SMART BATTERY PACKS |
| 中文描述： | 鋰電池保護(hù)電路的一個(gè)單元智能型電池組 |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大小： | 184K |
| 代理商： | MC33348 |
MC33348
6
MOTOROLA ANALOG IC DEVICE DATA
Cell Voltage
Sample
Switch
Over/Under
Cell Voltage
Detector
&
Reference
Over/Under
Data Latch
&
Control Logic
Charge/Discharge
Gate Drivers
Charge Pump
Oscillator
Ck
Ck
En
Charge Pump
Output
8
Charge
Gate Drive
Output
Discharge
Gate Drive
Output
Discharge
Switch Q2
4
6
5
Charge
Gate Drive
Common/
Discharge
Current Limit
7
VCC
1
3
Ground
R1
R2
R3
1.0 M
MC33348
CO
0.01
Discharge
Overcurrent
Detector
2
Test
Charge
Switch
Q1
Cell
Voltage
10
5.1 k
Sense
Enable
2.0 k
Figure 7. One Cell Smart Battery Pack
Cell
CI
0.1
Components CI is mandatory. Refer to the Battery Pack Application text.
PIN FUNCTION DESCRIPTION
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Test
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Output
discharging.
Cell Voltage
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Detector to an internal reference.
This pin is normally not connected and is used in testing the protection IC. An active low at this input
the cell voltage is sampled within 1.0 ms.
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This input is connected to the positive terminal of the cell for voltage monitoring. Internally, the Cell
Voltage Sample Switch applies this voltage to a resistor divider where it is compared by the Cell Voltage
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2
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Charge Gate Drive
Common/Discharge
Current Limit
threshold voltage, Vth(dschg), with respect to Pin 3.
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6
Charge Gate Drive
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This output connects to the gate of charge switch Q1 allowing it to enable or disable battery pack
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