Flash Driver. SP7686 Datasheet

SP7686 Driver. Datasheet pdf. Equivalent

Part SP7686
Description Constant Current Flash Driver
Feature www.DataSheet4U.com Solved by SP7686/7686A TM Constant Current Flash Driver in DFN 2mm x 3mm FEATU.
Manufacture Sipex Corporation
Datasheet
Download SP7686 Datasheet




SP7686
www.DataSheet4U.com
Solved by
SP7686/7686A
TM
Constant Current Flash Driver in DFN 2mm x 3mm
FEATURES
SP7686
SP7686A
Output current up to 500mA
Up to 94% efficiency in 1x mode
Built-in LED current setting DAC
One line serial interface
2.4MHz switching frequency
FB Reference voltage adjusts in 10mV steps
from 60mV to 360mV
DAC signal shutdown control
Power-saving shutdown mode of 10nA
PWM brightness control for DAC
Fast turn-on (<150µs)
3.5s Timeout function to protect the LED
Thermal shutdown protection
Built-in over-voltage and over-current protection
Fixed output versions available (SP7686A)
Automatic soft start limits in-rush current
Lead Free, RoHS Compliant Package:
Space saving 8-pin 2x3mm DFN
DESCRIPTION
The SP7686 is a current regulated charge pump ideal for powering high-brightness LEDs for camera FLASH
applications of up to 500mA. The charge pump automatically switches between step-up and step-down modes
ensuring that the LED current does not depend on the forward voltage. A low current sense reference voltage
(60mV to 360mV) allows the use of small 0603 current sensing resistors. The SP7686 has a DAC programmable
feedback reference voltage allowing the user to precisely set FLASH and TORCH output current levels, while the
fixed version SP7686A has set levels of FLASH and TORCH reference voltage. Both parts have over-voltage, over-
current, over-temperature and FLASH time-out protection features. The SP7686 is offered in the 2x3mm 8-pin DFN package.
TYPICAL APPLICATION CIRCUITS
0.22uF
VIN
10uF
CTRL
VIN C1 C2
SCP2 7686
CTRL
FB
PGND SGND
SGND
2.2uF
500mA
0.68
0.22uF
VIN
10uF
FLASH
EN
VIN
C1
C2
C2
SP7686A
FLAS
EN
PGND
FB
2.2uF
500mA
0.33
Jul16-07 RevP
SP7686: 500mA LED Driver
-1-
2007 Sipex Corporation



SP7686
www.DataSheet4U.com
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.
A ABSOLUTE MAXIMUM RATINGS
VIN,……………………………......... .............-0.6V to 6.0V
C1, C2, EN, CTRL, FB, VOUT…... .......-0.6V to VIN+0.3V
Power Dissipation…………..… ………..Internally limited1
Storage Temperature..…… ……………....-65°C to 150°C
Operating Temperature..............................-40°C to +85C
2x3mm 8 DFN ……….……… ……..……… θJA = 59°C/W
ESD CTRL pin…………..…… …………....+/-1.2kV HBM
ESD all other pins…………………….……....+/-2kV HBM
Torch Mode Continuous Current ………..………..200mA
ELECTRICAL SPECIFICATIONS
Unless otherwise specified: VIN = 3.6V, CIN=10µF, COUT=2.2µF, CFLY=0.22µF, Typical values at TA=25°C.
Indicates that values apply over the full operating temperature range of -40°C < TA < 85°C.
PARAMETER
Operating VIN Range
Operating Input Current
Shutdown Supply Current
Quiescent Current
FB Voltage for DAC=00000
FB Voltage for DAC=00001
FB Voltage for DAC=11111
FB DAC LSB
FB Voltage Accuracy
FB voltage (Fixed version, Torch)
FB Voltage (Fixed version, Flash)
FB Pin Current
Switching Frequency
Equivalent Resistance, 1x mode
Equivalent Resistance, 2x mode
Thermal Regulation
Thermal Shutdown Die
Temperature
Thermal Shutdown Hysteresis
Settle time (TS) after last count
Ctrl Input Data Rate
Wake-up time (TPOR) from VIN off
Wake-up time (TON) from
shutdown
Delay time (TDELAY) from 1st to 2nd
pulse
Turn-off time (TOFF) into shutdown
Turn-off time (TOFFC )into
shutdown
Time Duration before shutdown
Logic low voltage
Logic high voltage
CTRL, EN pin current
MIN TYP MAX
2.7 5.5
23
0.01 1
300
0
60
360
10
-10 10
55 60 65
147 160 173
0.5
2.0 2.4 2.8
0.6 1.4
8
0.01
140
15
15
0.5 1
50
600
200
25 75
50
200 350
2.8 3.5 4.2
0.4
1.4
0.5
UNITS
V
mA
µA
µA
mV
mV
mV
mV
%
mV
mV
µA
MHz
%/°C
°C
°C
µs
µsec
µs
µs
µs
µs
µs
s
V
V
µA
CONDITIONS
VIN = 2.7 – 5.5V, FLASH = 0V, Iload = 100uA
VCRTL < 0.4V for > 350µsec,
VEN < 0.4V (SP7686A)
VFB = 0mV, DAC=00000
60mV< VFB<360mV, Variation from specified VFB
Flash = LOW, (SP7686A)
Flash = HIGH, (SP7686A)
VFB =0.3V
VIN=3.6V
VIN=3.6V
VFB = 60mV
Driver turns off
Driver turns on again
CTRL minimum pulse width
VIN pin low to high, 1 CTRL pulse, VFB =0mV
1 CTRL pulse or (EN pin low to high SP7686A)
1st to 2nd CTRL pulse time delay – guaranteed
by design
EN pin high to low (SP7686A)
CTRL pin high to low
VFB>120mV (adj version 11 CTRL pulses),
FLASH= high (fixed version)
Driver shutdown
Driver enabled
(EN pin is SP7686A only)
Note 1: Guaranteed maximum allowable power dissipation depends on the ambient temperature.
Jul16-07 RevP
SP7686: 500mA LED Driver
-2-
2007 Sipex Corporation







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