TDA16846(2000) Ver la hoja de datos (PDF) - Infineon Technologies

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Fabricante

TDA16846
(Rev.:2000)

Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor Correction

Infineon Technologies 

Controller for Switch Mode Power Supplies

Supporting Low Power Standby and Power

Factor Correction

Preliminary Data

1

Overview

TDA 16846

TDA 16847

Bipolar IC

1.1

Features

• Line Current Consumption with PFC

• Low Power Consumption

P-DIP-14-3

• Stable and Adjustable Standby Frequency

• Very Low Start-up Current

• Soft-Start for Quiet Start-up

• Free usable Fault Comparators

• Synchronization and Fixed Frequency Facility

• Over- and Undervoltage Lockout

P-DSO-14-3

• Switch Off at Mains Undervoltage

• Temporary high power circuit (only TDA 16847)

• Mains Voltage Dependent Fold Back Point Correction

• Continuous Frequency Reduction with Decreasing Load

• Adjustable and Voltage Dependent Ringing Suppression Time

Type

TDA 16846

TDA 16847

TDA 16846G

TDA 16847G

Ordering Code

Q67000-A9377

Q67000-A9378

Q67006-A9430

Q67006-A9412

Package

P-DIP-14-3

P-DIP-14-3

P-DSO-14-3

P-DSO-14-3

1.2

Description

The TDA 16846 is optimized to control free running or fixed frequency flyback converters

with or without Power Factor Correction (Current Pump). To provide low power

consumption at light loads, this device reduces the switching frequency continuously

with load, towards an adjustable minimum (e. g. 20 kHz in standby mode). Additionally,

the start up current is very low. To avoid switching stresses of the power devices, the

power transistor is always switched on at minimum voltage. A special circuit is

implemented to avoid jitter. The device has several protection functions: VCC over- and

undervoltage, mains undervoltage, current limiting and 2 free usable fault comparators.

Regulation can be done by using the internal error amplifier or an opto coupler feedback

(additional input). The output driver is ideally suited for driving a power MOSFET, but it

can also be used for a bipolar transistor. Fixed frequency and synchronized operation

are also possible.

Data Sheet

3

2000-01-14

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