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TDA16847G Datasheet(PDF) 3 Page - Infineon Technologies AG

No. de pieza TDA16847G
Descripción Electrónicos  ICs for Consumer Electronics
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Fabricante Electrónico  INFINEON [Infineon Technologies AG]
Página de inicio  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

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Data Sheet
3
2000-01-14
Controller for Switch Mode Power Supplies
Supporting Low Power Standby and Power
Factor Correction
TDA 16846
TDA 16847
Preliminary Data
Bipolar IC
P-DSO-14-3
P-DIP-14-3
1
Overview
1.1
Features
• Line Current Consumption with PFC
• Low Power Consumption
• 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
• 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
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:
V
CC 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.
Type
Ordering Code
Package
TDA 16846
Q67000-A9377
P-DIP-14-3
TDA 16847
Q67000-A9378
P-DIP-14-3
TDA 16846G
Q67006-A9430
P-DSO-14-3
TDA 16847G
Q67006-A9412
P-DSO-14-3


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