30V 1.5A 1MHz Sync Step-Down Dimmable LED Driver

Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).

Thermal Information

Item

Description

Value

Unit

105

°C/W

Junction-to-case (top) thermal resistance

55

°C/W

Junction-to-board thermal resistance

17.5

°C/W

Junction-to-top characterization parameter

3.5

°C/W

Junction-to-board characterization parameter

17.5

°C/W

Note (1): The package thermal impedance is calculated in accordance to JESD 51-7.

Note (2): Thermal Resistances were simulated on a 4-layer, JEDEC board

Parameter

Test Conditions

Min

Typ.

Max

Unit

Input Voltage Range

4.5

30.0

V

Under-Voltage Lockout Threshold

4.1

4.4

V

3.3

3.7

V

400

mV

Shutdown Supply Current

170

250

µA

Quiescent Current

2.5

mA

Over Input Voltage

31.4

V

Feedback Reference Voltage

94

100

106

mV

Feedback Min Reference Voltage

3

5

7

mV

High-Side FET On-Resistance

100

120

140

mΩ

High-Side FET Peak Current Limit

3

3.5

4

A

Low-Side FET On-Resistance

60

70

80

mΩ

Low-Side FET Valley Current Limit

2.1

2.5

2.8

A

Analog Dimming Voltage

0.65

1.2

V

Dimming ON Threshold

0.67

V

Dimming OFF Threshold

0.55

V

Bias Voltage For High FET Driver

3

V

Operation Frequency

0.8

1.0

1.2

MHz

Minimum On Time

80

100

nS

Minimum Off Time

80

100

nS

Max Duty Cycle

85%

Thermal Shutdown

160

℃

Thermal Hysteresis

20

℃

Note (1): MOSFET on-resistance specifications are guaranteed by correlation to wafer level measurements.

Note (2): Thermal shutdown specifications are guaranteed by correlation to the design and characteristics analysis.