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What is IS31BL3233A?

This electronic component, produced by the manufacturer "ISSI", performs the same function as "1.5A FLASH/TORCH LED DRIVER".


IS31BL3233A Datasheet PDF - ISSI

Part Number IS31BL3233A
Description 1.5A FLASH/TORCH LED DRIVER
Manufacturers ISSI 
Logo ISSI Logo 


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IS31BL3233A
2MHz, 1.5A FLASH/TORCH LED DRIVER
Preliminary Information
September 2014
GENERAL DESCRIPTION
The IS31BL3233A 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 IS31BL3233A has
separate Flash Mode and Torch Mode enable pins for
maximum flexibility. The Flash Mode and Torch Mode
LED current is programmed by external resistors
respectively, making the flash LED solution simple to
control. If both enable pins are at logic high, the LED
current will be programmed by the Torch Mode setting
resistor. 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
IS31BL3233A, including cycle-by-cycle input current
limit protection, output over-voltage protection, LED
fault (open or short) protection and thermal shutdown
protection. The IS31BL3233A is available in a RoHS
compliant DFN-14 (2mm × 3mm) package.
FEATURES
Input voltage range: 2.7V~5.5V
Dual flash LED outputs
Drive up to total 1.5A or 0.75A per channel
1s time out in Flash Mode to protect LED
High efficiency up to 93% (1A, Flash Mode)
2MHz step-up converter
Independent Flash Mode enable and Torch Mode
enable pins
Torch Mode dimming via PWM control
Integrated thermal regulation control
LED open/short protection
Over-voltage protection
Cycle-by-cycle inductor current limit
Pb-free package: DFN-14 (2mm×3mm)
-40C° ~ +85C° temperature range
APPLICATIONS
Mobile phones
Smart phones and PDAs
Digital still cameras
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circuit (Torch Mode current is100mA and Flash Mode current is 500mA)
Integrated Silicon Solution, Inc. – www.issi.com
Rev. 0C, 09/11/2014
1

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IS31BL3233A equivalent
IS31BL3233A
ABSOLUTE MAXIMUM RATINGS
Supply voltage, VCC
Voltage at any input pin
Maximum junction temperature, TJMAX
Storage temperature range, TSTG
Operating temperature range, TA
ESD (HBM)
ESD (CDM)
-0.3V ~ +6.0V
-0.3V ~ VCC+0.3V
150°C
-65°C ~ +150°C
40°C ~ +85°C
8kV
1kV
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 condition 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.
ELECTRICAL CHARACTERISTICS
The following specifications apply for VCC = 3.6V, TA = 25°C, unless otherwise noted.
Symbol
Description
Condition
Min.
Typ. Max. Units
IC Supply
VCC
UVLO
UVLOHYST
Input operating range
Input under voltage lockout
UVLO hysteresis
ICC Operating current
ISD Shutdown current
Step-Up Converter
ILIM
fSW
DMAX
VOVP
tS
Peak NMOS current limit
Oscillator frequency
Maximum duty cycle
Internal over voltage
threshold of VOUT
Flash mode soft start time
Current Sink
Total output current, Torch
Mode
IOUT Total output current, Flash
Mode
IOUT
Output current matching
(Note 2)
ISHORT
LED short checking
current
Rising edge
Not switching (RSETM = 135k)
Switching (RSETM = 135k)
VENF = VENM = GND
RSETF = 9.1k(Note 1)
VENM = VCC, RSETM = 135k,
D1+D2
VENF = VCC = 3.8V, VENM = GND,
RSETF = 9.1k, D1+D2
50mA/CH
750m/CH
2.7 5.5 V
2.1 2.4 2.68 V
0.2 V
1.0 1.5 mA
1.8 2.6 mA
0.1 1 µA
3A
2.0 MHz
75 %
5.3 V
100 µs
90 100 110 mA
1.305 1.5 1.695 A
2 10 %
2 10 %
3.5 mA
Integrated Silicon Solution, Inc. – www.issi.com
Rev. 0C, 09/11/2014
5


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Part NumberDescriptionMFRS
IS31BL3233AThe function is 1.5A FLASH/TORCH LED DRIVER. ISSIISSI

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