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SC614

Features: Four independent current sinks for main backlight, adjustable from 0.4mA to 32mA eachDedicated MDIM pin for PWM dimming of main backlightThree independent current sinks for sub-backlight or flash, adjustable from 0.4mA to 102mA eachConfigurable sub-backlight or flash sinksDedicated SDIM ...

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SC614: Features: Four independent current sinks for main backlight, adjustable from 0.4mA to 32mA eachDedicated MDIM pin for PWM dimming of main backlightThree independent current sinks for sub-backlight o...

SC614 Data Sheet

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Part Number:
SC614
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/5/13

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Product Details

Description



Features:

Four independent current sinks for main backlight, adjustable from 0.4mA to 32mA each
Dedicated MDIM pin for PWM dimming of main backlight
Three independent current sinks for sub-backlight or flash, adjustable from 0.4mA to 102mA each
Configurable sub-backlight or flash sinks
Dedicated SDIM pin for PWM dimming of subbacklight
Dedicated FL pin for flash control
Current accuracy to within ±1.5% down to 4.8mA
Current matching to within ±0.5% down to 4.8mA
Very high efficiency over 90% of battery life
Shutdown current 0.1A (typ)
Three charge pump operating modes: 1x, 1.5x, and 2x
I2C serial interface
Soft-start/in-rush current limiting
1.33MHz and 250kHz programmable fixed frequency options
Short-circuit/thermal protection
Output open circuit protection
MLPQ-24 package (4mm x 4mm), fully WEEE and RoHS compliant


Application

Cellular phone backlighting and flash
LCD modules
PDA backlighting and flash
RGB LED Driver


Specifications

Parameter
Symbol
Maximum
Units
Supply Voltage
VIN
-0.3 to 6.5
V
Output Voltage
VOUT
-0.3 to 6.5
V
Pin Voltage - FLASH, CTRL0, CTRL1, ISET, C1-, C2-
-0.3 to VIN + 0.3
V
Pin Voltage - C1+, C2+
-0.3 to VOUT + 0.3
V
VOUT Short Circuit Duration
t SC
Indefinite
Thermal Resistance, Junction to Ambient (1)
JA
40
°C/W
Operating Ambient Temperature Range
TA
-40 to +85
°C
Junction Temperature Range
TJC
-40 to +150
°C
Storage Temperature Range
TSTG
-65 to +150
°C
IR Reflow Temperature
TLEAD
260
°C
ESD Rating (Human Body Model) (2)
VESD
2
°C



Description

The SC614 is a high efficiency charge pump LED driver using Semtech's proprietary mAhXLifeTM technology. Performance is optimized for use in Li-ion battery applications.

Each of 7 LED currents can be programmed via the I2C serial control bus. M1 through M4 are for LED backlighting of LCD main displays. S1/FL3 through S3/FL1 can be used for backlighting sub displays and/ or for driving flash LEDs. These three current sinks are configurable over the I2C interface for any combination of pins for sub or flash use.

The charge pump automatically selects an operating mode based on the number of active loads, input voltage, and load currents required. Any combination of LED drivers can be enabled at one time, allowing the SC614 to power any combination of backlight and flash required by the application.

Two dedicated pins, MDIM and SDIM, are provided to allow PWM dimming of the main and sub-backlights and one dedicated pin, FL, allows direct control of the flash. All three pins can be utilized without having to use the I2C interface once the registers are set up.

The enable pin can be used to put the device in low-current shutdown mode drawing 0.1A (typ), or a register can be written that sets the device in a sleep mode that reduces the current to 50A (typ).




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