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TDA16846

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

1

Overview

TDA 16846

TDA 16846-2

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 Circuits

• Over- and Undervoltage Lockout

P-DSO-14-3

• Switch Off at Mains Undervoltage

• Temporary High Power Circuit (only TDA 16847-2)

• 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

TDA 16846-2

TDA 16847-2

TDA 16846-2G

TDA 16847-2G

Ordering Code

Q67000-A9377

Q67000-A9378

Q67006-A9430

Q67006-A9412

Q67040-S4494

Q67040-S4496

Q67040-S4495

Q67040-S4497

Package

P-DIP-14-3

P-DIP-14-3

P-DSO-14-3

P-DSO-14-3

P-DIP-14-3

P-DIP-14-3

P-DSO-14-3

P-DSO-14-3

1.2

Description

The TDA 16846-2 (this name is used in the description for all types) 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 in small steps with load, towards an adjustable

minimum (e. g. 20 kHz in standby mode). Additionally, the startup current is very low. To

avoid switching stress on the power devices, the power transistor is always switched on

at minimum voltage. A special circuit is implemented to avoid jitter. The device has

Data Sheet

3

2003-07-31

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