Datasheet > BD7679G

BD7679G

更新时间： 2024-11-04 11:15:11

品牌	Logo	应用领域
罗姆 - ROHM		开关控制器软启动脉冲转换器
页数	文件大小	规格书
20页	985K
描述
AC/DC用PWM控制器型DC/DC转换器BD7679G为所有存在插口的产品提供很好的系统。绝缘、非绝缘均可对应，可轻松设计各种形式的低功耗转换器。外接开关用MOSFET及电流检测电阻，可实现自由度高的电源设计。通过峰值电流控制，可进行逐周期电流限制，发挥带宽和瞬态响应的优异性能。BD7679G内置了软启动功能、脉冲串功能、逐周期过电流限制、VCC过电压保护、过负荷保护等各种保护功能。备有外部停止用端子(COMP端子)，可通过外部信号停止开关(OFF)。此功能可用于过热保护及输出过电压保护等。开关频率固定为65kHz。内置跳频功能，有助于实现低EMI。

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BD7679G 数据手册

Datasheet

PWM Control Type

DC/DC Converter IC for AC/DC Driver

BD7679G

●General Description

●Key Specifications

BD7679G is a PWM controller type DC/DC converter

IC for AC/DC that provides an optimum system for all

products that requires an electrical outlet. This product

supports both isolated and non-isolated devices. IC

enables simple design of low-power electrical

converters. With switching MOSFET and current

detection resistor as external devices, it enables more

freedom in design.

 Power Supply Voltage range:

8.5V to 25.0V

0.60mA (Typ)

0.40mA (Typ)

65kHz (Typ)

-40°C to +85°C

 Operating Current:

Normal:

Burst:

 Oscillation Frequency:

 Operating Temperature range:

●Package

W(Typ) x D (Typ) x H (Max)

2.90mm x 2.80mm x1.25mm

SSOP6

Since the peak current control is utilized, peak current

is controlled in each cycles, application excels wide

bandwidth and transient response.

BD7679G includes various protective functions such

as soft start function, burst function, per-cycle over

current limiter, VCC overvoltage protection and

overload protection.

An external stop pin (COMP pin) is provided, so that

switching stopping can be set by external signals. The

function is available as overheating protection and over

voltage protection of secondary output, so on.

The PWM switching frequency is fixed at 65 kHz.

A frequency hopping function is included which contributes

to low EMI.

●Features

■

PWM frequency of 65kHz

PWM current mode method

Low circuit current when UVLO is ON

(12μA at VCC=12V)

Low circuit current without load

(Burst operation when load is light)

●Applications

AC adapters and household appliances (vacuum cleaners,

humidifiers, air cleaners, air conditioners, refrigerators, IH

cooking heaters, rice cookers, etc.)

■

Built-in SW frequency hopping function

250ns leading-edge blanking

VCC UVLO / OVP (Auto restart)

■

Per-cycle over current protection circuit

Soft start

Output overload protection(Auto-restart protection)

External stop function for COMP pin (Auto restart)

●Typical Application Circuit

Figure 1, Application Diagram (Isolated type)

○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays

.www.rohm.com

TSZ02201-0F2F0A200160-1-2

2015.6.24 Rev.002

1/17

TSZ22111・14・001

12 3 4 5 6 7...20

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与BD7679G相关器件

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BD7679G-GTR	ROHM	获取价格	Switching Controller, Current-mode, 1A, 65kHz Switching Freq-Max, PDSO6, SSOP-6
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BD7684FJ-LBE2	ROHM	获取价格	Switching Controller, PDSO8, SOP-8
BD7685FJ-LB	ROHM	获取价格	Low Noise Quasi-Resonant Control DC/DC converter IC for AC/DC Converter
BD7690FJ	ROHM	获取价格	作为AC/DC用功率因数校正转换器（Power Factor Correction: PF
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