Datasheet > TA848

TA848

更新时间： 2024-02-10 13:05:52

品牌	Logo	应用领域
其他 - ETC		控制器
页数	文件大小	规格书
14页	894K
描述
LED电源IC，脉宽调变控制器

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中文翻译

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数据手册

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TA848 数据手册

TA848

Novel Low Cost Green-Power PWM Controller

Features

Low Cost, PWM&PFM&CRM

Low Start-up Current (about 10µA)

Low Operating Current (about 2mA)

Current Mode Operation

Under Voltage Lockout (UVLO)

Built-in Synchronized Slope

Compensation

Programmable PWM Frequency

Leading edge Blanking on Sense input

Constant output power limiting for

universal AC input

Cycle-by-cycle current limiting

Clamped gate output voltage 16.5V

Over voltage protect 26.7V

High-Voltage CMOS Process with ESD

SOT-23-6L、SOP-8 & DIP-8 Pb-Free

Packaging

Compatible with SG5701 & SG5848 &

LD7535 &OB22632/63

Applications

Switching AC/DC Adaptor

Battery Charger

Open Frame Switching Power Supply

384X Replacement

General Description

The TA848 is a highly integrated low cost

edge blanking circuit on current sense input

could remove the signal glitch due to

snubber circuit diode reverse recovery and

current mode PWM controller, which is ideal

for small power current mode of offline

AC-DC fly-back converter applications.

Making use of external resistors, the IC

changes the operating frequency and

automatically enters the PFM/CRM under

light-load/zero-load conditions. This can

minimize standby power consumption and

achieve green-power functions. With a very

low start-up current, the TA848 could use

a large value start-up resistor (1.5Mohm).

Built-in synchronized slope compensation

enhances the stability of the system and

avoids sub-harmonic oscillation. Dynamic

peak limiting circuit minimizes output power

change caused by delay time of the system

over a universal AC input range. Leading

thus

greatly

reduces

the

external

component count and system cost in the

design. Pulse-by-pulse current limiting

ensures safe operation even during

short-circuit.

The TA848 offers more protection like

OVP (Over Voltage Protection) and OCP

(Over current protection). The TA848’s

output driver is clamped to maximum 16.5V

to protect the power MOSFET. Excellent

EMI performance is achieved soft switching

control at the totem pole gate driver output.

TA848 is offered in SOT-23-6, SOP-8 and

DIP-8 packages.

Dec, 2006

V1.5

1/14

12 3 4 5 6 7...14

中文翻译

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