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WS3110 데이터시트 PDF




Winsemi에서 제조한 전자 부품 WS3110은 전자 산업 및 응용 분야에서
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부품번호 WS3110 기능
기능 High Performance erformance LED Driver
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WS3110 데이터시트, 핀배열, 회로
WS3110
WS3110 High Performance LED Driver
Features
■ Fast start-up time
■ Low operation current (0.6mA)
■ PSR control with Single stage PFC topology
■ CC±5%
■ Programmable output current and output voltage
■ Internal Line and Load compensation
■ Internal soft-start
■ Built in Leading edge blanking (LEB)
■ Cycle-by-cycle Over-Current Protection
■ VCC over-voltage protection (VCC-OVP)
■ VCC under voltage lockout (UVLO
■ Over temperature protection (OTP)
■ Transformer saturation protection
■ Inter power-mos saturation protection
■ Output LED open/short protection
■ CS pin open/short protection
Applications
■ LED lighting
■ Down light
■ Tube lamp
■ PAR lamp
■ Bulb
General Description
WS3110 is a power factor correctionprimary-side-control
LED lighting driver with advanced features to provide high
efficiency control for lighting application.
WS3110 applies source driver technologyits internal fast
start-up circuit greatly shorten the start-up time while
keeping extremely low standby power consumption.
With internal line-compensation, the WS3110 provides
accurate constant current (CC ± 5%) regulation at
universal AC input.
WS3110 offers complete protection coverage with
automatic self-recovery feature including cycle by cycle
over current protection (OCP), VCC over-voltage
protection (VCC-OVP) and under voltage lockout (UVLO),
output LED short/open protection, CS pin short/open
protection, and over-temperature protection (OTP). The
gate-driven output ST is clamped to maximum 15V to
protect the external MOSFET. Excellent EMI performance
is achieved by using soft-driver technology.
WS3110 is offered in SOP-8 packages.
Typical Application Circuit
cs ST
gnd Source
comp vcc
mult ZCD
W/T-S023-Rev.A/2 Mar.2013
Copyright@Winsemi Microelectronics Co., Ltd., All right r eserved.
0313




WS3110 pdf, 반도체, 판매, 대치품
WS3110
Electrical Characteristics(Unless otherwise specifiedTA=25VCC=16V)
Supply Voltage (VCC)
symbol
parameter
Test condition
I_VCC_ST
Start up current
VCC=( UVLO_OFF -1)V
I_VCC_OP
Operation Current
Fs w=60KHz
Iq Static Current
VCC=14V, No switching
UVLO_ON
Turn on threshold Voltage
VCC falling
UVLO_OFF
Turn-off threshold Voltage
VCC rising
VCC_hold
VCC hold voltage
VCC falling
OVP
Over voltage
Threshold
protection
Ramp VCC until no-switching
Start up section (ST)
ST_clamp_be ST clamp before UVLO
Ist=1mA VCC=10V
ST_clamp_af
IST_be
IST_af
ST clamp after UVLO
IST before UVLO
IST after UVLO
VCC=14V
ST=14VVCC=10V
ST=14VVCC=14V
Error Amplifier Section
V REF
Reference voltage for EA
Comp_clamp Comp low-clamp voltage
Vcom p
Linear operating range
Vth_short
Output short threshold
MULT Section
V M ULT
Linear operating range
ZCD Section
VZCD
Demagnetization threshold
ZCD falling
VZCD_hys
VZCD threshold hysteresis
ZCD risind
ZCD_ovp
LED open-protect threshold
Toff_min
Minimum OFF time
Toff_max
Maximum OFF time
CS Section
Vth_ocp
Circle by circle OCP threshold
TLEB
LEB time
Td Delay to output
S Section
Rds_on
VCC=7.5VIds=1A
Steady, keep you advance
Min Typ Max Unit
40 70 uA
0.6 1.2 mA
0.32 0.6
mA
5.2 5.8 6.5 V
10 11 12 V
7 7.5 8 V
25.8
V
16 17 18 V
14 15 16 V
20 35 uA
35 60 uA
0.294 0.3
1.5
1.5
4.5
0.306 V
V
3.5 V
V
0 2.5 V
0.4 V
0.6 V
5.5 V
4 us
150 us
2.0 V
350 ns
180 ns
0.3 Ω
4/8

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WS3110 전자부품, 판매, 대치품
WS3110
The switch current is detected by a sense resistor into
the SENSE pin. The internal Leading-edge blanking
chops off the sense voltage spike at initial MOSFET on
state due to snubber diode circuit reverse recovery and
thus reduce the external RC filter circuit. The current limit
comparator is disabled and cannot turn off the external
MOSFET during the blanking period. PWM duty cycle is
determined by voltage level at comp pin and mult pin.
Error Amplifier and soft-start
The comp pin is the error amplifier output of WS3110,
and a 1 uF capacitor is connect from comp to GND to
make the CC loop stable.
During the startup period, an internal 300uA current will
quickly charge up comp to 1.5V, then the CC loop will
adjust the comp voltage according to the load condition.
Since the sink/source current of the error amplifier is
very small, the voltage of comp will rise slowly after
startup, and the PWM duty also increase slowly, so that
the soft-start is realized. The soft-start time depends on
the value of the compensation capacitor.
Saturation protection of transformer
The Source pin of WS3110 is used to detect the
operating state of the transformer and the internal power
MOS. When the Vds of the internal power mos (voltage
between Source pin and CS pin) is over 2.1V, the
internal power MOS saturation protection is triggered;
and when the voltage of pin Source is over 3.3V, the
transformer saturation protection will be triggered
Protection Controls
Good power supply system reliability is achieved with
auto-recovery protection features including cycle by
cycle over current protection (OCP), VCC over-voltage
protection (VCC-OVP) and under voltage lockout
(UVLO), output LED short/open protection, CS pin
short/open protection, and over-temperature protection
(OTP).
Steady, keep you advance
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부품번호상세설명 및 기능제조사
WS3110

High Performance erformance LED Driver

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