OCP8136 Driver Datasheet

OCP8136 Datasheet, PDF, Equivalent


Part Number

OCP8136

Description

High Efficiency Dual Color Temperature Dimming Dual-1.2A Flash LED Driver

Manufacture

Orient Chip

Total Page 3 Pages
Datasheet
Download OCP8136 Datasheet


OCP8136
OCP8136
High Efficiency Dual Color Temperature Dimming Dual-1.2A Flash
LED Driver With Separate 1-Wire Flash Dimming
General Description
The OCP8136 is a dual-channel 2MHz fixed
frequency synchronous boost converter, optimized for
maximum 2.4A(1.2A/channel) camera flash application
and maximum 1000mA (500mA/channel) movie mode
applications using high-current white LEDs in all single
cell Li-ion powered products. An adaptive regulation
method ensures the current for each LED remains in
regulation and maximizes efficiency.
The dual-channel flash LED drivers are
independent. ENM1 and ENF1 pins control channel 1
flash LED driver; ENM2 and EMF2 pins control
channel 2 flash LED driver.
Two simple logic control inputs (ENM1/2 and
ENF1/2) enable and disable flash and movie mode
operation of the OCP8136. Movie-mode and
Flash-mode current levels are independently fixed by
two separate resistors (RSETM1/2 and RSETF1/2).
For Flash mode, a default timer can be used either
to terminate a flash event or as a safety flash timer. In
flash mode, the flash LED current can be programmed
in 16 steps by the 1-wire dimming interface at ENF pin.
Two LEDs can be connected to the OCP8136.
The OCP8136 integrate an input voltage monitor
to monitor low battery conditions and can force the
LED current into movie mode.
Thermal regulation is integrated in Flash mode to
limit the ICs temperature and continuously provide the
maximum allowed output current.
The OCP8136 contain a thermal management
system to protect the device; a internal over-voltage
protection (OVP) circuitry prevents damaged to the
OCP8136 from open LED or open circuit conditions;
and a cycle-by-cycle current limit prevents damage to
the OCP8136. Built-in circuitry prevents excessive
inrush current during start-up. The shutdown feature
reduces quiescent current to less than 1.0μA.
The 2MHz switching frequency allow for the use of
tiny, low profile (1uH or 2.2uH) inductors and 4.7uF
ceramic capacitors. The device is available in 24-pin
4mmX4mm QFN package and is rated over the -40°C
to 85°C.
Features
Input Voltage Range : 2.7V to 4.8V
Separate Two Channel Control
Drives up to 1.2A Regulated Output Current
per Channel (Total 2.4A)
High Efficiency PWM Boost Converter
2.0MHz Fixed Switching Frequency
Up to 97% Efficiency with Small Inductor 1uH
Integrated Soft-Start Eliminates Inrush Current
Under Voltage Lock-Out
Thermal management and Current Scale Back
VIN Battery Voltage Sensing
Optimize Flash Current During Low Battery
Over Voltage (Open LED) Protection
LED Short Circuit Protection
Movie Mode Dimming via Maximum 10KHz
PWM Control
800mS Flash Timer Control
Cycle by Cycle Current Limit
Separate Hardware Flash and Movie Enable
Flash Mode With 1-wire Dimming
Independently Set Flash/Movie Currents
Flash Mode Current Up to 1.2A/channel
Movie Mode Current Up to 500mA/channel
Two Resistors Set Flash and Movie Current
Independently
Small Solution Size
Less than 1uA Shutdown Current
RoHS and Green Compliant
24-pin, 4mm X 4mm QFN Packages
-40to +85 Temperature Range
Applications
Camera Flashes and Movies
Cell Phones or Smart Phones
PDAs and Digital Camera
White LED Biasing
Mobil Handsets
Tablet PCs and Laptops/Netbooks
Camcorder Video Light (Movie Light)
Page1 - 3
Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下

OCP8136
Pin Configuration
QFN4040-24L (Top View)
OCP8136
Figure 1, Pin Assignments of OCP8136
Typical Application Circuit
Mov ie Enable
Flash Enable
RF2 6.8K
VIN2(2.7V-4.8V) L2 1uH
VIN
CIN2
4.7uF
OUT2
VIN1(2.7V-4.8V) L1 1uH
VIN
CIN1
4.7uF
13
NC
14 SW2
15 OUT2
16
VIN1
17 PGND1
18 SW1
OCP8136
RSETM2
LED2
RSETF1
RSETM1
LED1
NC
6
5
4
3
2
1
RM2 34K
RF1 6.8K
RM1 34K
U1
D2 LED
D1 LED
OUT2
COUT2
4.7uF
OUT1
COUT1
4.7uF
Flash Enable
Mov ie Enable
OUT1
Figure 2A, Typical Application Circuit of OCP8136
Page2 - 3
Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下


Features WWW.ORIENT-CHIP.COM OCP8136 High Effic iency Dual Color Temperature Dimming Du al-1.2A Flash LED Driver With Separate 1-Wire Flash Dimming ◼ General Descr iption The OCP8136 is a dual-channel 2M Hz fixed frequency synchronous boost co nverter, optimized for maximum 2.4A(1.2 A/channel) camera flash application and maximum 1000mA (500mA/channel) movie m ode applications using high-current whi te LEDs in all single cell Li-ion power ed products. An adaptive regulation met hod ensures the current for each LED re mains in regulation and maximizes effic iency. The dual-channel flash LED drive rs are independent. ENM1 and ENF1 pins control channel 1 flash LED driver; ENM 2 and EMF2 pins control channel 2 flash LED driver. Two simple logic control i nputs (ENM1/2 and ENF1/2) enable and di sable flash and movie mode operation of the OCP8136. Movie-mode and Flash-mode current levels are independently fixed by two separate resistors (RSETM1/2 an d RSETF1/2). For Flash mode, a default timer can be used either.
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