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参数资料
| 型号： | UCC3957MTR-1G4 |
| 厂商： | Texas Instruments |
| 文件页数： | 4/15页 |
| 文件大小： | 0K |
| 描述： | IC LI-ION PROTECT CIRCUIT 16QSOP |
| 标准包装： | 2,500 |
| 功能： | 过压/欠压保护 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 5 V ~ 20 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP/QSOP |
| 包装： | 带卷 (TR) |
Not Recommended for New Designs
UCC3957 1, UCC3957 2, UCC3957 3, UCC3957 4
SLUS236B – JANUARY 1999 – REVISED SEPTEMBER 2002
Terminal Functions
TERMINAL
NAME
AN1
AN2
AN3
AN4
AVDD
BATLO
CHGEN
CDLY1
NO.
4
5
6
7
15
8
9
10
I/O
I
I
I
I
O
I
I
O
DESCRIPTION
Connects to the negative terminal of the top battery cell and the positive terminal of the second battery cell.
Connects to the bottom terminal of the second battery cell and the top terminal of the third battery cell.
Connects to the bottom terminal of the third battery cell and the top terminal of the fourth battery cell in a four
cell stack. In a three cell pack it connects to the bottom terminal of the third battery and to AN4.
Connects to the bottom terminal of the battery stack and the top of the current sense resistor.
Internal analog supply bypass cap pin. Connect a 0.1- μ F capacitor between this pin and AN4. This pin is
nominally 7.3 V.
Connects to the bottom of the current sense resistor and the negative terminal of the battery pack.
The charge enable input for the protection IC. This point must be driven high to DVDD or AVDD to allow
charging of the battery pack. This pin has a very weak pulldown.
Delay control pin for the short-circuit protection feature. A capacitor connected between this point and AN4
determines the time delay from when an overcurrent situation is detected to when the FET is turned off. This
capacitor also controls the hiccup mode timeout period.
CDLY2
CLCNT
14
2
O
I
An external cap can be tied between this pin and AN4 to extend the blanking time on the second current limit
tier.
This pin programs the IC for three or four cell operation. Tying this pin low (to AN4) sets four cell operation,
while tying it high (to DVDD or AVDD) sets three cell operation. This pin is internally pulled low, so open cir-
cuit conditions always result in four-cell mode.
DCHG
CHG
13
12
O
O
This pin is used to prevent overdischarge. If the state machine indicates that any cell is undervoltage, this pin
is driven high with respect to chip substrate so that the external P-channel MOSFET prevents further dis-
charge. If all cell voltages are above the minimum threshold, this pin is driven low.
This pin is used to control an external N-channel MOSFET, which in turn drives a P-channel MOSFET. If at
least one cell voltage is over the overvoltage threshold, this pin is driven low with respect to AN4. If all cell
voltages are below this threshold, this pin is driven high.
DVDD
VDD
WU
4
16
1
3
O
I
I
Internal digital supply bypass capacitor pin. Connect a 0.1- μ F capacitor between this pin and AN4. This pin is
nominally 7.3V.
Supply voltage to the IC. Connect this point to the top of the lithium-ion battery stack.
This pin is used to provide a wakeup signal to the IC during sleep mode. Connect this pin to the drain of the
N-channel level shift MOSFET.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UCC3957MTR-2 | 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| UCC3957MTR-2G4 | 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| UCC3957MTR-3 | 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| UCC3957MTR-3G4 | 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| UCC3957MTR-4 | 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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