AL8807

HIGH EFFICIENCY LOW EMI 36V 1A BUCK LED DRIVER

AL8807

Document number: DS35281 Rev. 4 - 2

3 of 21

www.diodes.com

June 2012

© Diodes Incorporated

Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

5.9

V

Internal regulator hysteresis

threshold

100

300

mV

Quiescent current

Output not switching (Note 2)

350

µA

Input supply Current

CTRL pin floating f = 250kHz

1.8

5

mA

Set current Threshold Voltage

95

100

105

mV

Set threshold hysteresis

±20

mV

SET pin input current

16

22

µA

CTRL pin input resistance

Referred to internal reference

50

k

Ω

Internal Reference Voltage

2.5

V

On Resistance of SW MOSFET

0.25

0.4

Ω

SW rise time

12

ns

SW fall time

20

ns

Switch leakage current

0.5

μA

Thermal Resistance Junction-to-

Ambient (Note 3)

SOT25 (Note 4)

250

°C/W

MSOP-8EP (Note 5)

69

Thermal Resistance Junction-to-

Lead (Note 6)

SOT25 (Note 4)

50

Thermal Resistance Junction-to-

case (Note 7)

MSOP-8EP (Note 5)

4.3

Notes:

3. Refer to figure 35 for the device derating curve.

4. Test condition for SOT25: Device mounted on FR-4 PCB (25mm x 25mm 1oz copper, minimum recommended pad layout on top layer and thermal

vias to bottom layer ground plane. For better thermal performance, larger copper pad for heat-sink is needed.

5. Test condition for MSOP-8EP: Device mounted on FR-4 PCB (51mm x 51mm 2oz copper, minimum recommended pad layout on top layer and

thermal vias to bottom layer with maximum area ground plane. For better thermal performance, larger copper pad for heat-sink is needed

6. Dominant conduction path via Gnd pin (pin 2).

7. Dominant conduction path via exposed pad.