STR-A6153E

Universal-Input/20 W

Flyback Switching Regulator

www.allegromicro.com

3

Switching

Regulators

Pin

Ratings

Characteristic

No.

Symbol

Test Conditions

Min

Typ

Max

Units

Drain-to-Source Breakdown Volt.

8 - 1

V

(BR)DSS

650

-

-

V

Drain Leakage Current

8 - 1

I

DSS

-

-

300

µA

On-State Resistance

8 - 1

r

DS(on)

-

-

1.9

Ω

MOSFET Switching Time

8 - 3

t

f

-

-

-

250

ns

Operation Start Voltage

2 - 3

19.2 V

16

17.5

19.2

V

Operation Stop Voltage

2 - 3

9 V

9.0

10

11

V

Circuit Current in Operation

2 - 3

-

-

-

4.0

mA

Circuit Current in Non-Operation

2 - 3

-

-

50

µA

Maximum OFF Time

8 - 3

-

10.5

11.5

12.5

µs

OCP Threshold Voltage

1 - 3

-

0.96

1.13

1.28

V

Leading Edge Blanking Time

8 - 3

-

200

320

480

ns

Burst Threshold Voltage

4 - 3

0.66

0.75

0.84

V

OLP Threshold Voltage

4 - 3

-

6.5

7.2

7.9

V

Current at OLP Operation

4 - 3

-

-18.2

-26

-34.1

µA

Maximum FB Current

4 - 3

-

220

300

390

µA

Start-Up Current

5 - 3

340

790

1230

µA

Start-Up Circuit Leakage Current

5 - 3

--

-

30

µA

OVP Operation Voltage

2 - 3

V

CC(OVP)

34.1 V

28.7

31.2

34.1

V

OVP/TSD Latch Sustaining Current

2 - 3

I

CC(H)

8.5 V

-

-

200

µA

OVP/TSD Latch Release Voltage

2 - 3

V

CC

6.6 V

6.6

7.3

8.0

V

Thermal Shutdown

-

T

J

-

110

-

-

°C

Thermal Resistance

-

-

-

-

52

°C/W

WARNING — These devices are designed to be operated at lethal voltages and energy levels. Circuit designs

that embody these components must conform with applicable safety requirements. Precautions must

be taken to prevent accidental contact with power-line potentials. Do not connect grounded test

equipment.

The use of an isolation transformer is recommended during circuit development and breadboarding.