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WD3100 데이터시트 PDF




WillSEMI에서 제조한 전자 부품 WD3100은 전자 산업 및 응용 분야에서
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부품번호 WD3100 기능
기능 200mA Flash/Torch LED Driver
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WD3100 데이터시트, 핀배열, 회로
WD3100
200mA Flash/Torch LED Driver
Descriptions
WD3100 is a low cost Flash/Torch LED driver
designed for front camera flash and small current
rear camera flash application.
WD3100 integrates a current sink to ensure constant
LED current when conditions such as VBAT voltage,
LED VF voltage, ambient temperature change.
The LED current can be adjusted by external resistor
connected between RSET pin and GND, and also
can be set to default 200mA by just simply connect
RSET pin to GND.
WD3100 has flash time-out protection function to
prevent LED lamp from overheating in abnormal
conditions.
Features
Input voltage range
: 2.7~5.5 V
Maximum configurable ILED : 200mA
ILED accuracy
: +/- 20%
Flash timeout protection
Over temperature protection
SOT363 package
Applications
Front Camera Flash
Small Current Rear Camera Flash
LED Torch
Other small current LED driver
WD3100
http//:www.sh-willsemi.com
SOT-363
Pin configuration (Top view)
FA = Device code
* = Month code
Order information
Device
Package
Shipping
WD3100B-6/TR SOT363 3000/Reel&Tape
Will Semiconductor Ltd.
1 Jun, 2016 - Rev. 1.4




WD3100 pdf, 반도체, 판매, 대치품
Electrical Characteristics
(Ta=25oC, VCC=3.8V, CIN=1uF, unless otherwise noted)
Parameter
Quiescent supply current
Shutdown current
External set LED current
Internal set default LED
current
EN logic high
EN logic low
Turn on time
Turn off time
Dropout voltage
Timeout protection time
Over-temperature shutdown
threshold
Over-temperature threshold
hysteresis
Symbol
IQ
ISD
ILED_RSET
Conditions
VEN=3.8V, ILED=200mA
VEN=0V
VEN=3.8V, RSET=24K
ILED_INT VEN=3.8V, RSET=0
VIH
VIL
tON
tOFF
VDROP
tTIMEOUT
ILED=200mA, from EN rising
edge to 90% ILED
ILED=200mA, from EN falling
edge to 10% ILED
VEN=3.8V, ILED=160mA
VEN=3.8V, ILED=80mA
VEN=3.8V, CT=0.1uF
TSD
THYS
WD3100
Min.
170
Typ.
220
210
Max.
1
250
Units
uA
uA
mA
160 200 240 mA
1.6 V
0.4 V
12 uS
6
100 150
50 80
600
155
uS
mV
mV
mS
oC
20 oC
Will Semiconductor Ltd.
4 Jun, 2016 - Rev. 1.4

4페이지










WD3100 전자부품, 판매, 대치품
Application Information
WD3100
Flash Mode LED Current
The LED current can be set either by an external resistor RSET connected between RSET pin and GND, or by
just directly connecting RSET pin to GND. When WD3100 is turned on, the device will automatically detect
RSET pin status: if there is a resistor RSET connected between RSET pin and GND, ILED will be set by RSET
value following below equation, and if RSET pin is directly short to GND, ILED will be internally set to default
200mA.
The relationship between RSET and ILED is:
ILED = 4.8K / RSET
Torch Mode LED Current
In torch mode, the average LED current can be adjusted by PWM control signal applied to the EN pin.
Recommended PWM frequency range is 100-4KHz. The maximum PWM frequency depends on the total turn
on and turn off time. The duty cycle of the PWM signal is proportional to average LED current. The LED
current during PWM on status is the same as in the flash mode.
Flash Time-out Protection
WD3100 has flash time-out protection function. When continuous on time exceeds certain value, the LED
current will be shut off to prevent LED lamp from overheating. After protection, the LED current will remain
zero, and can be restarted only by turning off and on the device again.
The time-out time value can be set by a capacitor connected between CT pin and GND. The relationship
between time-out time and CT value is:
tTIMEOUT = 5.5M * CT
This time-out protection function can be disabled by connecting CT pin directly to GND.
Over Temperature Protection
WD3100 has over temperature protection function. In abnormal status, such as LED short, when junction
temperature of WD3100 exceeds 150, internal blocks will be shut off to protect the device, and it will
recover automatically when junction temperature decreased to below 130.
Power Consumption Calculation
The maximum allowable power dissipation of the device is determined by the following relationship:
Pdis_ max
TOT TA
JA
In which: θJA is the thermal resistance between junction to ambient temperature, TOT is the over temperature
protection threshold, and TA is the ambient temperature.
The power dissipation of the device can be calculated by the following equation:
Pdis VLED * I LED
In which: VLED is LED pin voltage, ILED is LED current
Will Semiconductor Ltd.
7 Jun, 2016 - Rev. 1.4

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부품번호상세설명 및 기능제조사
WD3100

200mA Flash/Torch LED Driver

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