Document
SGM3135 3-Channel Low Dropout Low Side White LED Driver
GENERAL DESCRIPTION
The SGM3135 driver provides a simple solution for a matched current source for common Anode LED configuration.
The SGM3135 can drive three LEDs or one LED at three times the current. The factory preset current value is 20mA per channel.
The SGM3135 requires only a 40mV dropout voltage at a 20mA load on each output to match the LED brightness.
The SGM3135 is available in Green SOT-23-6 package. It operates over an ambient temperature range of -40℃ to +85℃.
APPLICATIONS
Wireless Handsets MP3, MP4, and PMP Cellular Phones Portable Communication Devices Digital Cameras, Camcorders PDAs, Palmtops, and Handy Terminals LED/Display Back Light Driver LEDs for Camera Flash Battery-Powered Equipment
FEATURES
● Support up to 3 LEDs ● Low 40mV Dropout at 20mA ● Less than ±5% LED Current Matching ● Simple LED Brightness Control ● Low Shutdown Current ● 2.5V to 5.5V Supply Voltage Range ● Low EMI and Switching Noise ● Enable/Shutdown Control ● Operating Temperature Range: -40℃ to +85℃ ● Available in Green SOT-23-6 Package
TYPICAL APPLICATION
VIN
CIN 0.1µF
LED1 LED2 LED3
VCC
SGM3135
PWM
EN
GND
SG Micro Corp www.sg-micro.com
REV. A. 2
SGM3135
3-Channel Low Dropout Low Side White LED Driver
PACKAGE/ORDERING INFORMATION
MODEL SGM3135
ORDER NUMBER SGM3135YN6G/TR
PACKAGE DESCRIPTION
SOT-23-6
SPECIFIED TEMPERATURE
RANGE
-40°C to +85°C
PACKAGE OPTION
Tape and Reel, 3000
MARKING INFORMATION
S04XX
NOTE: Order number and package marking are defined as the follow:
ORDER NUMBER
MARKING INFORMATION
SGM3135 X X G / TR
S04 X X
Tape and Reel Green Product
Chip produce month ("A" = Jan. "B" = Feb. … "L" = Dec.) Chip produce year ("9" = 2009, "A" = 2010 …)
Package Type N6 SOT-23-6
Operating Temperature Range Y -40℃ to +85℃
For example: S049A (2009 year, the 1st month)
ABSOLUTE MAXIMUM RATINGS
VCC to GND …………….……………..……….…... -0.3V to 6V The Other Pins to GND………………...………...... -0.3V to 6V Storage Temperature Range...…….………....-65℃ to +150℃
Junction Temperature…………………………………......150℃
Operating Temperature Range…...……....……-40℃ to +85℃
Power Dissipation, PD @ TA = 25℃ SOT-23-6……….………………….…….…..…………….. 0.5W Package Thermal Resistance SOT-23-6, θJA…………………………..…………..….. 250℃/W Lead Temperature (Soldering 10 sec) …………………………………..………………………….. 260℃ ESD Susceptibility HBM………………………………………...………………4000V MM…………………………………..…...…….…………….400V
NOTE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay attention to ESD protection. SGMICRO recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
SGMICRO reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. Please contact SGMICRO sales office to get the latest datasheet.
SG Micro Corp www.sg-micro.com
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SGM3135 PIN CONFIGURATION (TOP VIEW)
3-Channel Low Dropout Low Side White LED Driver
S04XX
VCC 1 GND 2
6 LED1 5 LED2
EN 3
4 LED3
SOT-23-6 NOTE: The location of pin 1 on the S04XX is determined by orienting the package marking as shown.
PIN DESCRIPTION
PIN NAME
FUNCTION
1 VCC Power Input. 2 GND Ground.
3 EN Enable Input. (Active High).
4
LED3
LED3 Output Pin. Connect to LED3’s cathode. 20mA constant current output. LED3 is high impedance when EN is low.
5
LED2
LED2 Output Pin. Connect to LED2’s cathode. 20mA constant current output. LED2 is high impedance when EN is low.
6
LED1
LED1 Output Pin. Connect to LED1’s cathode. 20mA constant current output. LED1 is high impedance when EN is low.
SG Micro Corp www.sg-micro.com
3
SGM3135
3-Channel Low Dropout Low Side White LED Driver
ELECTRICAL CHARACTERISTICS
(VIN = 3.7V, TA = +25°C, unless otherwise noted.)
PARAMETER Operation Voltage Range Shutdown Supply Current LED Sink Current Quiescent Power Supply Current LED Dropout Voltage LED Current Deviation Matching Input High Voltage at EN Input Low Voltage at EN OTP
OTP Hysteresis
SYMBOL VCC ISHDN ILED IQ
DLED VIH VIL
CONDITIONS
VEN < 0.4V
ILED = 0 ILED = 20mA, VLED @ ILEDn=90% × ILED
VEN > VIH for enable IH VEN < VIL for disable IL
MIN TYP 2.5
1 18 20
190 40 -5 1.5
145 10
MAX 5.5
22
90 +5
0.4
UNITS V μA mA μA mV % V V
℃
℃
SG Micro Corp www.sg-micr.