Datasheet > 驱动程序和接口 > 外围驱动器> AP2156SG-13

AP2156SG-13

更新时间： 2024-01-03 07:29:42

品牌	Logo	应用领域
美台 - DIODES		外围驱动器驱动程序和接口开关接口集成电路电源开关光电二极管 PC
页数	文件大小	规格书
17页	530K
描述
0.5A DUAL CHANNEL CURRENT-LIMITED POWER SWITCH

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AP2156SG-13 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP, SOP8,.25	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	19 weeks
风险等级：	1.64	Samacsys Confidence：	3
Samacsys Status：	Released	Samacsys PartID：	440470
Samacsys Pin Count：	8	Samacsys Part Category：	Integrated Circuit
Samacsys Package Category：	Small Outline Packages	Samacsys Footprint Name：	SOP8
Samacsys Released Date：	2020-02-12 16:43:43	Is Samacsys：	N
内置保护：	OVER CURRENT; THERMAL	驱动器位数：	2
接口集成电路类型：	BUFFER OR INVERTER BASED PERIPHERAL DRIVER	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e3	长度：	4.9 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	输出电流流向：	SINK
最大输出电流：	0.5 A	标称输出峰值电流：	0.5 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	1.75 mm	子类别：	Peripheral Drivers
最大供电电压：	5.5 V	最小供电电压：	2.7 V
标称供电电压：	3.3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	3.9 mm	Base Number Matches：	1

AP2156SG-13 数据手册

AP2146/AP2156

0.5A DUAL CHANNEL CURRENT-LIMITED POWER

SWITCH

Application Note

Power Supply Considerations

A 0.01-μF to 0.1-μF X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is

recommended. Placing a high-value electrolytic capacitor on the input (10-μF minimum) and output pin(s) is

recommended when the output load is heavy. This precaution reduces power-supply transients that may

cause ringing on the input. Additionally, bypassing the output with a 0.01-μF to 0.1-μF ceramic capacitor

improves the immunity of the device to short-circuit transients.

Over-current and Short Circuit Protection

An internal sensing FET is employed to check for over-current conditions. Unlike current-sense resistors,

sense FETs do not increase the series resistance of the current path. When an overcurrent condition is

detected, the device maintains a constant output current and reduces the output voltage accordingly.

Complete shutdown occurs only if the fault stays long enough to activate thermal limiting.

Three possible overload conditions can occur. In the first condition, the output has been shorted to GND

before the device is enabled or before V^INhas been applied. The AP2146/AP2156 senses the short circuit

and immediately clamps output current to a certain safe level namely I_LIMIT

In the second condition, an output short or an overload occurs while the device is enabled. At the instance

the overload occurs, higher current may flow for a very short period of time before the current limit function

can react. After the current limit function has tripped (reached the over-current trip threshold), the device

switches into current limiting mode and the current is clamped at I_LIMIT

In the third condition, the load has been gradually increased beyond the recommended operating current.

The current is permitted to rise until the current-limit threshold (I_TRIG) is reached or until the thermal limit of

the device is exceeded. The AP2146/AP2156 is capable of delivering current up to the current-limit threshold

without damaging the device. Once the threshold has been reached, the device switches into its current

limiting mode and is set at I_LIMIT

Note that when the output has been shorted to GND at extremely low temperature (< -30^oC), a minimum

120-μF electrolytic capacitor on the output pin is recommended. A correct capacitor type with capacitor

voltage rating and temperature characteristics must be properly chosen so that capacitance value does not

drop too low at the extremely low temperature operation. A recommended capacitor should have

temperature characteristics of less than 10% variation of capacitance change when operated at extremely

low temp. Our recommended aluminum electrolytic capacitor type is Panasonic FC series.

FLG Response

When an over-current or over-temperature shutdown condition is encountered, the FLG open-drain output

goes active low after a nominal 7-ms deglitch timeout. The FLG output remains low until both over-current

and over-temperature conditions are removed. Connecting a heavy capacitive load to the output of the

device can cause a momentary over-current condition, which does not trigger the FLG due to the 7-ms

deglitch timeout. The AP2146/AP2156 is designed to eliminate false over-current reporting without the need

of external components to remove unwanted pulses.

AP2146/AP2156 Rev 1

13 of 17

APRIL 2009

www.diodes.com

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