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OCP8113
1.3A Buck/Boost Charge Pump LED Driver
General Description
The OCP8113 is current-regulated charge pump
ideal for powering high brightness LEDs for camera
flash applications. The charge pump can be set to
regulate two current levels for FLASH and TORCH
modes.
The OCP8113 automatically switches modes
between step-up and step-down ensuring that LED
current does not depend on the forward voltage. It
switches at 1.8MHz, allowing the use of tiny
components. The supply voltage ranges from 2.7V to
5.5V and is ideally suited for all applications powered by
a single Li_Ion battery cell or three to four NiCd, NiMH,
or Alkaline battery cells.
The OCP8113 also features a very low shutdown
current (less than 1uA), an automatic soft-start mode to
limit inrush current, as well as over current, over voltage
and over temperature shutdown control.
The OCP8113 has two packages: DFN-10L and
QFN-16L package and is specified over an ambient
temperature range of -40˚C to 85˚C.
Pin Configuration
DFN3030-10L (Top View)
Features
Output Current up to 1.3A at VIN=3.6V
Up to 94% Efficiency in Torch Mode
Adjustable FLASH Mode Current
Minimum External Components: No Inductors
Automatic Buck/Boost Mode Switchover
Wide VIN Range: 2.7V to 5.5V
High Frequency Operation: 1.8MHz
50mV Reference for low Loss Sensing
ISD < 1μA in Shutdown
PWM Dimming Control
Automatic Soft Start Limits Inrush Current
Over Voltage Protection on Output
Over Current Protection
Over Temperature Protection
Low Input and Output Ripple and Low EMI
Ultra-low Dropout Voltage in Buck Mode
Space Saving RoHS Compliant, Lead Free
Package: 10-pin 3mm x 3mm DFN and
16-pin 4mm x4mm QFN
Applications
White LED Torch/Flash for Cell Phones, DSCs,
and Camcorders
White LED Backlighting
Generic Lighting/Flash/Strobe Applications
General Purpose High Current Boost
QFN4040-16L (Top View)
Figure 1, Pin Assignments of OCP8113
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Ver. 1.1 Feb .27, 2018
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OCP8113
1.3A Buck/Boost Charge Pump LED Driver
Pin
Name
VIN
CN
CP
FLASH
EN
RSET
FB
SGND
PGND
VOUT
NC
GND
Pin No.
DFN3030 QFN4040
-10L
-16L
1 1,2
26
37
48
59
6 11
7 12
Pin Function
Input Voltage for the charge pump. Decouple with 4.7µF or 10uF ceramic
capacitor close to the pins of the IC.
Negative input for the external flying capacitor. Connect a ceramic 1 µF
capacitor close to the pins of the IC.
Positive input for the external flying capacitor. Connect a ceramic 1 µF
capacitor close to the pins of the IC.
Logic input to toggle operation between FLASH and TORCH mode. In
TORCH mode FB is regulated to the internal 50mV reference. In FLASH
mode FB reference voltage can be adjusted by changing the resistor from
RSET pin to ground. Choose the external current sense resistor (RSENSE)
based on desired current in TORCH mode. This pin does not have an
internal pull-up/pull- down; do not leave this pin floating. (RSENSE
Resistance should be less than 0.25Ω).
Shutdown control input. Connect to VIN for normal operation, connect to
ground for shutdown. Dont leave this pin floating.
Connect a resistor from this pin to ground. When in FLASH mode (FLASH
= High) this resistor sets the current regulation point according to the
following:
VFB
= 14uA* RSET
5
(Flash Mode).
Feedback input for the current control loop. Connect directly to the current
sense resistor.
8 13 Internal ground pin. Control circuitry returns current to this pin.
9 14 Power ground pin. Flying capacitor current returns through this pin.
10
15
Charge Pump Output Voltage. Decouple with an external capacitor. At
least 1 µF is recommended. Higher capacitor values reduce output ripple.
-
Exposed
Pad
3,4,5,10,1
6
Exposed
Pad
Not Connected.
Exposed pad should be soldered to PCB board and connected to GND.
Typical Application Circuit
Figure 2, Typical Application Circuit of OCP8113
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Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下

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Ordering Information
OCP8113
1.3A Buck/Boost Charge Pump LED Driver
Part Number
OCP8113VAD
OCP8113QAD
Current Limit
1.3A
1.3A
Package Type
DFN3030-10L
QFN4040-16L
Package Qty
13-in reel
3000pcs/reel
13-in reel
3000pcs/reel
Temperature
-4085
-4085
Eco Plan
Green
Green
Lead
Cu
Cu
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Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下