Datasheet > NJW4120M

NJW4120M

更新时间： 2024-02-27 22:17:46

品牌	Logo	应用领域
NJRC		ISM频段信息通信管理光电二极管
页数	文件大小	规格书
20页	311K
描述
Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO20, DMP-20

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技术参数
数据手册

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NJW4120M 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：	SSOP,	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.69
其他特性：	OVER VOLTAGE PROTECTION	可调阈值：	YES
模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT	JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e6	长度：	10 mm
信道数量：	1	功能数量：	1
端子数量：	20	最高工作温度：	85 °C
最低工作温度：	-20 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	2 mm
最大供电电压 (Vsup)：	14 V	最小供电电压 (Vsup)：	2.7 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
技术：	BICMOS	温度等级：	OTHER
端子面层：	TIN BISMUTH	端子形式：	GULL WING
端子节距：	0.95 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	5 mm
Base Number Matches：	1

NJW4120M 数据手册

NJW4120

■Feature Description

1. Photocoupler Feedback Unit (PC pin, CHG-SW pin, TX-SW pin)

NJW4120 feeds back voltage and current information that are required for battery charging via a photocoupler to the

primary side of the AC/DC converter, and controls AC/DC converter output. No special method is required if the

primary side of the AC/DC converter that is being controlled (whether self excited or externally excited) has circuitry

that takes into account the range of output voltage and current that is required for charge control.

It also incorporates an adaptor output mode, and extraction of any constant voltage output is possible. The following

will switch between charge control and adaptor output.

CHG-SW pin, and TDET pin battery set detection are both on: Charge control mode

Either CHG-SW pin, or TDET pin battery set detection is off: Adaptor output mode

However, if charging is prohibited due to over voltage detection, temperature detection, or the charge over timer, or

when there is 2mA of charge, the system will move to adaptor mode.

The unit that controls feedback to the photocoupler consists of the ADP voltage control, charge voltage control, and

charge current control amps. Each amp controls the photocoupler drive transistor via an OR circuit (Figure 1).

Adaptor output

To AC/DC converter

R_A1

primary side control

R_A2

ADP

NFB

TX-SW

CVCC-ON

SW transistor

ADP voltage

control

V_REF1

To current detection

(1.24V)

12dB amp

CVCC-ON

To P-CHG pin

To Q-CHG pin

CVCC-ON

To VS pin

Charge Current control

Charge voltage control

V_REF2

(2.1V)

Pre/Quick charge switch

Figure 1 : Photocoupler Feedback Unit and SW Transistor

Ver.2013-02-12

- 8 -

1...5 6 789 10 11...20

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