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STCF06TBR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P35
July 2010 Doc ID 14549 Rev 3 1/35
35
STCF06
1.5 A white LED driver with I²C interface
Features
■ Buck-boost DC-DC converter
■ Drives one power LED up to:
– 1.5 A between 3.5 V to 5.5 V
– 1.3 A between 3.0 V to 5.5 V
– 1 A between 2.7 V to 5.5 V
■ Efficiency up to 80%
■ Output current control
■ 1.8 MHz fixed frequency PWM
■ Full I²C control
■ Operational modes:
– Shutdown mode
– Ready mode + auxiliary red LED
– Ready mode + NTC
– Flash mode: up to 1.5 A
– Torch mode: up to 370 mA
■ Soft and hard triggering of flash
■ Flash and torch dimming with 16 exponential
values
■ Dimmable red LED indicator auxiliary output
■ Internally or externally timed flash operation
■ Digitally programmable safety time-out in flash
mode
■ LED over temperature detection and protection
with external NTC resistor
■ Open and shorted LED failure detection and
protection
■ Chip over temperature detection and protection
■ < 1 µA shutdown current
■ Package 3 x 3 mm TFBGA25
Applications
■ Cell phones and smart phones
■ Camera flashes/strobe
■ PDAs and digital still cameras
Description
The STCF06 is a high efficiency power supply
solution to drive a single flash LED in camera
phones, PDAs and other battery powered
devices. It is a buck-boost converter able to
guarantee a proper LED current control over all
possible conditions of battery voltage and LED
forward voltage. The output current control
ensures a good current regulation over the
forward voltage spread characteristics of the flash
LED. All the functions of the device are controlled
through the I²C bus which helps to reduce logic
pins on the package and to save PCB tracks on
the board. Hard and soft-triggering of flash are
both supported. The device includes many
functions to protect the chip and the power LED,
such as: soft start control, chip over temperature,
open and shorted LED detection and protection.
TFBGA25 (3 x 3 mm)
Table 1. Device summary
Order code Package Packaging
STCF06TBR TFBGA25 (3 x 3 mm) 3500 parts per reel
www.st.com
Obsolete Product(s) - Obsolete Product(s)
Contents STCF06
2/35 Doc ID 14549 Rev 3
Contents
1 Description (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Buck-boost converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.3 Logic pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.3.1 SCL, SDA pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.3.2 TRIG pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.3.3 ATN pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.3.4 ADD pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3.5 TMSK pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.4 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.5 Shutdown, shutdown with NTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.6 Ready mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.7 Single or multiple flash using external (microprocessor) temporization . . 15
7.8 External (microprocessor) temporization using TRIG_EN bit . . . . . . . . . 15
7.9 Single flash using internal temporization . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.10 Multiple flash using internal temporization . . . . . . . . . . . . . . . . . . . . . . . . 16
8 I²C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1 Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.2 Start and stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.3 Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Obsolete Product(s) - Obsolete Product(s)
STCF06 Contents
Doc ID 14549 Rev 3 3/35
8.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.5 Writing to a single register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.6 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.7 Writing to multiple registers with incremental addressing . . . . . . . . . . . . 20
8.8 Reading from a single register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.9 Reading from multiple registers with incremental addressing . . . . . . . . . 21
9 Description of internal registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.1 PWR_ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.2 TRIG_EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.3 TCH_ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.4 NTC_ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.5 FTIM_0~3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.6 TDIM_0~3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.7 FDIM_0~3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.8 AUXI_0~3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9.9 AUXT_0~3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9.10 F_RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9.11 LED_F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9.12 NTC_W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.13 NTC_H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.14 OT_F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.15 VOUTOK_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Obsolete Product(s) - Obsolete Product(s)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P35

STCF06TBR

Mfr. #:
Buy STCF06TBR
Manufacturer:
STMicroelectronics
Description:
LED Lighting Drivers 1.5A WHITE LED DRVR
Lifecycle:
New from this manufacturer.
Delivery:
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