Sept25-07 Rev D

SP7601 29V High Voltage LED Driver

© 2007 Exar Corporation

Page 2

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL SPECIFICATIONS

PARAMETER

MIN

TYP

MAX

UNITS

♦

CONDITIONS

UVLO Turn-On Threshold

4.0

4.2

4.5

V

0

°C to 125°C

UVLO Turn-Off Threshold

3.8

4.0

4.3

V

0

°C to 125°C

UVLO Hysteresis

0.2

V

Operating Input Voltage

Range

4.5

29

V

0

°C to 125°C

Operating Input Voltage

Range

7

29

V

♦

Operating VCC Current

2

3

mA

VFB=0.1V, gate not switching

Standby VCC Current

0.6

1

mA

VFB=1.2V, gate not switching

Reference Voltage

0.2

V

Reference Voltage

0.186

0.214

V

♦

Switching Frequency

960

1200

1440

kHz

Peak-to-peak ramp Voltage

Vin/10

V

Ramp clamped to <= 4.2V

Minimum ON-Pulse Duration

40

100

ns

♦

Minimum Duty Cycle

0

%

Maximum Duty Cycle

100

%

Gate Driver Turn-Off

Resistance

50

60

kΩ

Internal resistor between GATE

and VIN

Gate Driver Pull-Down

Resistance

4

8

Ω

resistance between GATE and

VDR

Gate Driver Pull-up

Resistance

3

6

Ω

resistance between GATE and VIN

VIN - VDR voltage difference

4.5

5.5

V

Overcurrent Threshold

300

350

400

mV

Measure VIN - LX

LX pin Input Current

25

33

40

μA

OFF interval during hiccup

50

ms

SHDN Threshold

0.8

1.0

1.2

V

SHDN Threshold Hysteresis

100

mV

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.

Input Voltage….................................................-0.3V to 30V

Lx………………………………………………….…-2V to 30V

FB……………..................................................-0.3V to 5.5V

Storage Temperature..…………….…..……-65

°C to 150 °C

Junction Temperature...................................-40

°C to 125°C

Lead Temperature (Soldering, 10 sec)….….………..300

°C

ESD Rating………...……1kV LX, 2kV all other nodes, HBM