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| 型号： | TPS65131RGETG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封装： | 4 X 4 MM, GREEN, PLASTIC, QFN-24 |
| 文件页数： | 15/34页 |
| 文件大小： | 785K |
| 代理商： | TPS65131RGETG4 |
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Soft Start
Overvoltage Protection
Undervoltage Lockout
Overtemperature Shutdown
TPS65130, TPS65131
SLVS493B – MARCH 2004 – REVISED SEPTEMBER 2004
DETAILED DESCRIPTION (continued)
Both converters have implemented soft-start functions. When each converter is enabled, the implemented switch
current limit ramps up slowly to its nominal programmed value in about 1 ms. Soft start is implemented to limit
the input current during start-up to avoid high peak currents at the battery which could interfere with other
systems connected to the same battery. Without soft start, uncontrolled input peak currents flow to charge up the
output capacitors and to supply the load during start-up. Their values could increase the implemented switch
current limit, which has serious impact to the converter itself and other parts of the system, by causing significant
voltage drops across the series resistance of the battery and its connections.
Both built-in converters have implemented overvoltage protection. If the feedback voltage under normal operation
exceeds the nominal value by typically 5%, the corresponding converter shuts down immediately to protect any
connected circuitry from possible damage.
An undervoltage lockout prevents the device from starting up and operating if the supply voltage at VIN is lower
than the programmed threshold shown in the electrical characteristic table. The device automatically shuts down
both converters when the supply voltage at VIN falls below this threshold. Nevertheless, parts of the control
circuits remain active, which is different than device shutdown using EN inputs. The undervoltage lockout
function is implemented to prevent device malfunction.
The device automatically shuts down both converters if the implemented internal temperature detector detects a
chip temperature above the programmed theshold shown in the electrical characteristics table. It automatically
starts operating again when the chip temperature falls below this threshold. A built-in hysteresis avoids undefined
operation caused by ringing from shutdown and prevents operating at a temperature close to the
overtemperature shutdown threshold.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS65131TRGERQ1 | 制造商:Texas Instruments 功能描述:IC REG BST INV ADJ 2A DL 24VQFN 制造商:Texas Instruments 功能描述:TPS65131TRGERQ1 |
| TPS65132A0YFFR | 制造商:Texas Instruments 功能描述:DUAL OUTPUT LCD BIAS |
| TPS65132AYFFR | 制造商:Texas Instruments 功能描述:DUAL OUTPUT LCD BIAS |
| TPS65132B0YFFR | 制造商:Texas Instruments 功能描述:DUAL OUTPUT LCD BIAS |
| TPS65132B2YFFR | 功能描述:DUAL OUTPUT LCD BIAS 15DSBGA 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 显示类型:LCD，OLED 配置:- 接口:I2C 数字或字符:- 电流 - 电源:540μA 电压 - 电源:2.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:15-UFBGA，DSBGA 供应商器件封装:15-DSBGA 标准包装:1 |
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