2

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

48102.002

LED Drivers

LC5200 Series

Recommended Operating Conditions

Characteristic

Symbol

Conditions

Min.

Typ.

Max.

Unit

Supply Voltage

Lowest voltage can vary depending on LED

loads

25

–

400

V

Average Output Current

LC5205D

–

–

0.4

A

LC5210D

–

–

0.8

A

REF Input Voltage

In normal operation

–

–

0.5

V

Case Temperature

–

–

105

°C

Characteristic

Symbol

Notes

Rating

Units

Supply Voltage

450

V

Output Breakdown Voltage

450

V

Output Current

0.5

A

1.0

A

REF Pin Input Voltage

V

SENSE Pin Voltage

V

Allowable Power Dissipation

On Sanken evaluation PCB; affected by applica-

tion PCB layout

1.73

W

Junction Temperature

150

ºC

Operating Ambient Temperature

–40 to 105

ºC

Storage Temperature

–40 to 150

ºC

Selection Guide

Part Number

(A)

LC5205D

0.5

LC5210D

1.0

All performance characteristics given are typical values for

circuit or system baseline design only and are at the nominal

operating voltage and an ambient temperature of 25°C, un-

less otherwise stated.

Terminal List Table

Name

Number

Function

Reg

1

Regulator output pin for powering external components. Connect 0.1 μF bypass

capacitor between this pin and GND.

Toff

2

For self-oscillation operation, connect external capacitor and resistor to set

off-time. For externally-controlled PWM operation, input PWM adjustment signal.

Ref

3

Reference voltage input pin, for output peak current.

Sen

4

Connect external resistor for PWM peak current control and OCP.

OUT

5

Internally connected to the MOSFET drain, output connection to LED load.

VBB

6

Supply voltage pin; internally connected to the voltage regulator to power the

internal circuits.

–

7

No connection; pin removed to increase creepage distance from VBB pin.

GND

8

Device ground pin.

Pin-out Diagram

1

2

3

4

8

7

6

5

GND

(Removed)

VBB

OUT

Reg

Toff

Ref

Sen