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SP6685 Datasheet Preview

SP6685 Datasheet

Charge Pump LED Driver For Camera Flash

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® Preliminary
SP6685
Charge Pump LED Driver For Camera Flash
FEATURES
High Output Current Charge Pump: 700mA
VIN 1
10 VOUT
Adjustable FLASH mode
x1 and x2 Automatic Modes for High Efficiency
Minimum External Components: No Inductors
High Frequency Operation: 2.4 MHz
Low 50mV reference for low loss sensing
C1 2
C2 3
FLASH 4
EN 5
SP6685
10 Pin DFN
9 PGND
8 SGND
7 FB
6 RSET
1 µA shutdown current
PWM Dimming Control
Now Available in Lead Free Packaging
Over voltage protection on output
Over current protection
Over temperature protection
Space Saving 10-pin 3mm x 3mm DFN
Package
APPLICATIONS
LED Torch/Flash for Cell
Phones, DSCs, and Camcorders
Generic Lighting/Flash/Strobe
Applications
DESCRIPTION
The SP6685 is a 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 SP6685 automatically switches modes between step-up
and step-down ensuring that LED current does not depend on the forward voltage. A low
current sense reference voltage (50mV) allows the use of small 0603 current sensing
resistors. The SP6685 is offered in 10-pin DFN package.
TYPICAL APPLICATION CIRCUIT
VIN
(2.7 - 4.3V)
CIN
4.7µF
CFC
1µF
TORCH/FLASH
ENABLE
VIN ® VOUT
C1 SP6685 PGND
C2
FLASH
EN
SGND
FB
RSET
COUT
1µF
D1
1W LED
VREF = 50 - 150mV
RSET
88.7K
RSENSE
0.22
Date: 12/15/04
SP6685 Charge Pump LED Driver for Camera Flash
1
© Copyright 2004 Sipex Corporation




Sipex

SP6685 Datasheet Preview

SP6685 Datasheet

Charge Pump LED Driver For Camera Flash

No Preview Available !

VIN - VOUT ....................................................................... -0.3V to 6V
Output Current Pulse (Flash) ................................. 1A
Output Current Continuous (Torch) ..................... 0.4A
Storage Temperature ...................... -65°C to +150°C
Operating Temperature ..................... -40°C to +85°C
EN ................................................................ 0V to 7V
ESD. ........................................................... 2kV HBM
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
ELECTRICAL CHARACTERISTICS
TA = -40°C to +85°C, VIN =3.6, CIN = 4.7µF, CFC = COUT = 1.0µF. VSHDN = VIN, typical values at 25°C. The denotes the
specifications which apply over the full operating range unless otherwise noted.
PARAMETER
Operating Input Voltage
Quiescent Current
Shutdown Current
Oscillator Frequency
Charge Pump Equivalent
Resistance (x2 mode)
Charge Pump Equivalent
Resistance (x1 mode)
FB Reference Voltage
FB Reference Voltage
MIN. TYP.
2.7
0.5
2
2.4
5
MAX.
4.3
2
1
UNITS
CONDITIONS
V
mA VIN = 2.7 - 4.3V FLASH = 0V,
Iload = 100µA
µA
MHz
FLASH = VIN, 2x mode
VIN = 4.3V, VEN = 0V
VFB = 0V, VIN= 3.6V
0.6 0.8
VIN= 3.6V
142 150
45 50
158
55
mV FLASH = VIN RSET = 100K
mV FLASH = GND
FB Pin Current
EN, FLASH Logic Low
EN, FLASH Logic High
EN, FLASH Pin Current
VOUT Turn-on Time
Thermal Shutdown
Temperature
Thermal Hysteresis
1.3
250
0.5
0.4
0.5
500
145
10
µA VFB = 1V
V
V
µA
µs VIN = 3.6V, FB within 90% of
regulation
ºC
ºC
Date: 12/15/04
SP6685 Charge Pump LED Driver for Camera Flash
2
© Copyright 2004 Sipex Corporation


Part Number SP6685
Description Charge Pump LED Driver For Camera Flash
Maker Sipex
Total Page 10 Pages
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