參數(shù)資料
型號(hào): TDA16846G
廠(chǎng)商: INFINEON TECHNOLOGIES AG
元件分類(lèi): 穩(wěn)壓器
英文描述: 0.1 A POWER FACTOR CONTROLLER, 98 kHz SWITCHING FREQ-MAX, PDSO14
封裝: PLASTIC, DSO-14
文件頁(yè)數(shù): 8/28頁(yè)
文件大小: 586K
代理商: TDA16846G
TDA 16846
TDA 16846-2
Data Sheet
16
2003-07-31
3
Protection Functions
The chip has several protection functions:
Current Limiting
See “Primary Current Simulation PCS (Pin 2) / Current Limiting” and “Fold Back Point
Correction PVC (Pin 11)”.
Over- and Undervoltage Lockout OV/SVC (Pin 14)
When
V
14 at Pin 14 exceeds 16.5 V, e. g. due to a fault in the regulation circuit, the Error
Flip Flop ERR is set and the output driver is shut-down. When
V
14 goes below the lower
SVC threshold, ERR is reset and the driver output (Pin 13) and the soft-start (Pin 4) are
shut down and actively held low.
Primary Voltage Check PVC (Pin 11)
When the voltage
V
11 at Pin 11 goes below 1 V the Error Flip Flop (ERR) is set. E.g. a
voltage divider from the rectified mains at Pin 11 prevents high input currents at a too low
input voltage.
Free Usable Fault Comparator FC1 (Pin 10)
When the voltage at Pin 10 exceeds 1 V, the Error Flip Flop (ERR) is set. This can be
used e. g. for mains overvoltage shutdown.
Free Usable Fault Comparator FC2 (Pin 6)
When the voltage at Pin 6 exceeds 1.2 V, the Error Flip Flop (ERR) is set. A resistor
between Pin 9 (REF) and ground is necessary to enable this fault comparator.
Voltage dependent Ringing Suppression Time
During start-up and short-circuit operation, the output voltage of the converter is low and
parasitic zero crossings are applied for a longer time at Pin 3. Therefore the Ringing
Suppression Time TC1 (see “Off-Time Circuit OTC (Pin 1)”) is extended with a factor of
2.2 at a low output voltage. The voltage at pin 1 must not fall below the limit V1L.
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