WS21351 Datasheet PDF - Winsemi
| Part Number | WS21351 | |
| Description | Half-bridge power IC | |
| Manufacturers | Winsemi | |
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datasheet pdf - http://www.DataSheet4U.net/
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WS21351
Half-bridge power IC for CFL lamps
FEATURES
■ Integrated 600V half-bridge gate driver
■ Lower power level-shifting circuit
■ Adjustable oscillator frequency and preheat time
■ Maximum voltage of 600 V
■ Internal clamping zener diode
■ Soft start functionality
Product Summary
VOFFSET
Duty Cycle
Tr/Tp
Vclamp
Deadtime (typ.)
600V Max.
50%
80/40ns
15.6V typ.
2μs
GERNERAL DESCRIPTION
The WS21351 is a high-voltage monolithic
integrated circuit which is designed for driving
Compact Fluorescent Lamps (CFL) in a half-bridge
configuration.WS21351 features a soft start function,
an adjustable oscillator and an internal drive function
with a high-voltage level shifter for driving the half
bridge.
Packages
8 Lead PDIP
TYPICAL APPLICATION
Rev. A Mar.2010
Copyright@Winsemi Microelectronics Co., Ltd., All right reserved.
T11-1
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datasheet pdf - http://www.DataSheet4U.net/
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Lamp ignites successfully, the voltage on pin CPH
continues to increase until it internally limits at 6V
(VCPH_MAX). The frequency stops decreasing when
VCPH reach 5V and stays at the minimum frequency
as programmed by an external resistor, on pin RMIN
(as show in Fig 4). The minimum frequency should
be set below the High-Q resonance frequency of the
ballast output stage to ensure that the frequency
ramps through resonance for lamp Ignition
.The desired preheat time can be set by adjusting
the slope of the VCPH ramp with the external
capacitor on pin CPH. The relation of LCC tank
frequency and Pin CPH voltage VCPH as show in
Fig5.
WS21351
Run Mode
TheWS21351 enters RUN mode when the voltage
on pin CPH exceeds 5V . The lamp has ignited and
the ballast output stage becomes a low-Q, series-L,
parallel-RC circuit. The voltage on the CPH pin
continues to increase but the frequency don't change
as the minimum frequency is reached. The resonant
inductor, resonant capacitor, DC bus voltage and
minimum frequency determine the running lamp
power. The relation of minimum run frequency and
the setting resistor RRMIN as show in Fig 6. The IC
stays at this minimum frequency unless VDD
decreases below the VDDTH– threshold
Steady, keep you advance
5/7
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for WS21351 electronic component. |
| Information | Total 7 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ WS21351.PDF Datasheet ] | |
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| Part Number | Description | MFRS |
| WS21351 | The function is Half-bridge power IC. Winsemi | |
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