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BCT3662 Datasheet Preview

BCT3662 Datasheet

2-Ch Boost Serial LED Driver

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Ver 1.3
BCT3662
2-Ch Boost Serial LED Driver
Features
3.0V to 5.5V Input Voltage Range
2 Parallels of 28V for up to 6 LEDs in series
Max current 25mA for each string
Current accuracy, <±3%
Current match between the
channel<±1.5%
Dimming control
Over current/voltage protection
Inrush current protection
Up to 90% Efficiency
RoHS Compliant and 100% Lead Free
Package DFN2x2-6
Description
BCT3662 is a step up, two channel LED driver
and each channel can support up to 6 LEDs for
backlighting. It runs at 600kHz fixed switching
frequency to reduce output ripple and EMI,
improve conversion efficiency, and allow for the
use of small external components. During the
operation, the dimming control can be done
through CTRL pin by PWM. The current match
between the channels is within 1.5%.
The BCT3662 is available in a space saving
2mm x 2mm 6-pin DFN package and is
specified over the -40 to 85 extended
temperature range.
Applications
Cellular Phones
Ultra Mobile Devices
Portable Media Players
PDAs, GPS Receivers
Pin Configurations (Top View)
TDFN-6
LX 1
6 GND
CTRL 2
5 LED2
VDD 3
4 LED1
Ordering Information
Part Pin-Package
BCT3662ELT-TR
DFN2x2-6
Temp-Range
-40°C to +85°C
Typical Application Circuit
Top Mark
3662
Supplied as:
3000units/Tape & Reel
www.broadchip.com
1




BROADCHIP

BCT3662 Datasheet Preview

BCT3662 Datasheet

2-Ch Boost Serial LED Driver

No Preview Available !

Ver 1.3
Pin Description
NO. NAME I/O
DESCRIPTION
1 LX I Switching pin of for boost serial LEDs
2 CTRL I Control pin can be used for PWM dimming control
3 VDD G Power supply
4 LED1 I Serial LED string1 input Pins
5 LED2 I Serial LED string2 input Pins
6 GND G Ground
Absolute Maximum Ratings(1)
Symbol
VIN
VCTRL
VSW
PD
TJ
TSTG
Description
Supply Voltages on VDD (2)
Voltages on CTRL(2)
Voltage on SW(2)
Continuous Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
Value
0.3 to 6
0.3 to 6
0.3 to 28
See Dissipation Rating Table
40 to 150
65 to 150
Unit
V
V
V
°C
°C
(1) 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 under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions
for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
Recommended Operating Conditions
Symbol Description
MIN
TYP
MAX
UNIT
VIN Input voltage range, VIN
L Inductor(1)
3.0
10
5.5 V
22 µH
CIN Input capacitor
1 10 µF
CO Output capacitor(1)
1
10 uF
TA Operating ambient temperature
-40
85 °C
TJ Operating junction temperature
-40
125 °C
(1) These values are recommended values that have been successfully tested in several applications. Other values
may be acceptable in other applications but should be fully tested by the user.
Dissipation Ratings
RqJC
20°C/W
RqJA
140°C/W
DERATING FACTOR
ABOVE TA = 25°C
7.1 mW/°C
TA < 25°C
715 mW
TA = 70°C
395 mW
TA = 85°C
285 mW
www.broadchip.com
2


Part Number BCT3662
Description 2-Ch Boost Serial LED Driver
Maker BROADCHIP
PDF Download

BCT3662 Datasheet PDF






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