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SGM3785 Datasheet Preview

SGM3785 Datasheet

1.5A Flash LED Driver

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SGM3785
2MHz, 1.5A Flash LED Driver
in TDFN-3×2-14L Package
GENERAL DESCRIPTION
The SGM3785 is the ideal power solution for high-
power flash LEDs used with cell phone camera
modules or digital still cameras. It is a highly integrated
step-up DC/DC converter with very high switching
frequency, fixed at 2MHz, providing a very small total
solution for portable photo flash. The SGM3785 has
separate Flash mode and Movie/Torch mode enable
pins for maximum flexibility. Flash mode is usually used
with 660ms timer control to generate a high intensity
flash. The Flash mode and Movie/Torch mode maxim
LED current is programmed by external resistors
respectively, making the flash LED solution simple to
control. The real LED current at Flash mode and
Movie/Torch mode can be programmed by external
PWM signal at ENM pin.
The two LED output sinks can be shorted together
externally for higher power single flash LEDs, up to
1.5A continuous LED current. Thermal regulation is
integrated in Flash mode to limit the IC’s temperature
and continuously provide the maximum allowed output
current.
Various protection features are built into the SGM3785,
including cycle-by-cycle input current limit protection,
output over-voltage protection, LED fault (open or short)
protection and thermal shutdown protection. The
leakage current in shutdown is less than 1μA.
The SGM3785 is available in a Green TDFN-3×2-14L
package. It operates over an ambient temperature
range of -40to +85.
FEATURES
Input Voltage Range: 3V to 5V
Dual Flash LED Outputs
Drive Up to Total 1.5A or 0.75A per Channel
High Efficiency LED Driver (Up to 90%)
2MHz Step-Up Converter
Very Small Inductor: 1.0μH
Independent Flash Mode Enable and Movie/Torch
Mode Enable Pins
Flash Mode and Movie/Torch Mode LED Current
Can be Programmed via PWM Signal at ENM Pin
One Resistor Sets Flash Mode LED Current
One Resistor Sets Movie/Torch Mode LED Current
Integrated Thermal Regulation Control
660ms Flash Timer Control
330kΩ Pull-Down Resistor on ENM or ENF Pin
LED Open or Short Protection
Output Over-Voltage Protection
Cycle-by-Cycle Inductor Current Limit
Less than 1μA Shutdown Current
Available in a Green TDFN-3×2-14L Package
Temperature Range: -40to +85
APPLICATIONS
Portable Equipment
SG Micro Corp
www.sg-micro.com
JANUARY 2019 – REV. A. 4




SG Micro

SGM3785 Datasheet Preview

SGM3785 Datasheet

1.5A Flash LED Driver

No Preview Available !

SGM3785
2MHz, 1.5A Flash LED Driver
in TDFN-3×2-14L Package
PACKAGE/ORDERING INFORMATION
MODEL
SGM3785
PACKAGE
DESCRIPTION
TDFN-3×2-14L
SPECIFIED
TEMPERATURE
RANGE
-40to +85
ORDERING
NUMBER
SGM3785YTDP14G/TR
PACKAGE
MARKING
3785DP
XXXXX
PACKING
OPTION
Tape and Reel, 3000
MARKING INFORMATION
NOTE: XXXXX = Date Code and Vendor Code.
XXXXX
Vendor Code
Date Code - Week
Date Code - Year
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
ABSOLUTE MAXIMUM RATINGS
VIN, VOUT, D1 and D2 Voltages......................... -0.3V to 6V
ENF, ENM, RSETF, RSETM ....................-0.3V to VIN + 0.3V
SW Voltage....................................................... -0.3V to 6.5V
Package Thermal Resistance
TDFN-3×2-14L, θJA .................................................... 75/W
Junction Temperature.................................................+150
Storage Temperature Range ........................ -65to +150
Lead Temperature (Soldering, 10s) ............................+260
ESD Susceptibility
HBM............................................................................. 2000V
MM................................................................................. 200V
RECOMMENDED OPERATING CONDITIONS
Operating Temperature Range ....................... -40to +85
OVERSTRESS CAUTION
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
ESD SENSITIVITY 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.
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
JANUARY 2019
2


Part Number SGM3785
Description 1.5A Flash LED Driver
Maker SG Micro
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SGM3785 Datasheet PDF






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