SP7686 datasheet(2/16 Pages) SIPEX

2 / 16 page

Jul16-07 RevP

SP7686: 500mA LED Driver



2007 Sipex Corporation

- 2 -

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

MIN

TYP

MAX

UNITS

CONDITIONS

Operating VIN Range

2.7

5.5

♦

Operating Input Current

VIN = 2.7 – 5.5V, FLASH = 0V, Iload = 100uA

Shutdown Supply Current

0.01

µA

VCRTL < 0.4V for > 350µsec,

VEN < 0.4V (SP7686A)

Quiescent Current

300

µA

VFB = 0mV, DAC=00000

FB Voltage for DAC=00000

♦

FB Voltage for DAC=00001

FB Voltage for DAC=11111

360

FB DAC LSB

FB Voltage Accuracy

-10

♦

60mV< VFB<360mV, Variation from specified VFB

FB voltage (Fixed version, Torch)

♦

Flash = LOW, (SP7686A)

FB Voltage (Fixed version, Flash)

147

160

173

♦

Flash = HIGH, (SP7686A)

FB Pin Current

0.5

♦

µA

VFB =0.3V

Switching Frequency

2.0

2.4

2.8

♦

MHz

Equivalent Resistance, 1x mode

0.6

1.4

♦

VIN=3.6V

Equivalent Resistance, 2x mode

VIN=3.6V

Thermal Regulation

0.01

%/°C

VFB = 60mV

Thermal Shutdown Die

Temperature

140

°C

Driver turns off

Thermal Shutdown Hysteresis

°C

Driver turns on again

Settle time (TS) after last count

µs

Ctrl Input Data Rate

0.5

sec

CTRL minimum pulse width

Wake-up time (TPOR) from VIN off

600

♦

µs

VIN pin low to high, 1 CTRL pulse, VFB =0mV

Wake-up time (TON) from

shutdown

200

♦

µs

1 CTRL pulse or (EN pin low to high SP7686A)

Delay time (TDELAY) from 1

st to 2nd

pulse

µs

st to 2nd CTRL pulse time delay – guaranteed

by design

Turn-off time (TOFF) into shutdown

µs

EN pin high to low (SP7686A)

Turn-off time (TOFFC )into

shutdown

200

350

♦

µs

CTRL pin high to low

Time Duration before shutdown

2.8

3.5

4.2

♦

VFB>120mV (adj version 11 CTRL pulses),

FLASH= high (fixed version)

Logic low voltage

0.4

♦

Driver shutdown

Logic high voltage

1.4

♦

Driver enabled

CTRL, EN pin current

0.5

♦

µA

(EN pin is SP7686A only)

Note 1: Guaranteed maximum allowable power dissipation depends on the ambient temperature.

ELECTRICAL SPECIFICATIONS

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.

VIN,……………………………......... .............-0.6V to 6.0V

C1, C2, EN, CTRL, FB, VOUT…... .......-0.6V to VIN+0.3V

Power Dissipation…………..… ………..Internally limited

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

A ABSOLUTE MAXIMUM RATINGS

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