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Confidential

SiFirst_DS_1539HT_V1.1

SF1539HT

Pin Configuration

RT

VDD

1

2

3

FB

GND

GND

Drain

DIP8

4

8

7

6

5

CS

Drain

Ordering Information

Part Number

Top Mark

Package

Tape & Reel

SF1539HTDP

SF1539HTDP

DIP8

RoHs

Output Power Table

(1)

Part Number

230VAC ± 15%

(2)

85-265VAC

Adapter

(3)

Open Frame

(4)

Adapter

(3)

Open Frame

(4)

SF1539HTDP

18W

26W

13W

16W

Note 1. The Max. output power is limited by junction temperature

Note 2. 230VAC or 100/115VAC with doublers

Note 3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat

sink at 50

Note 4. Max. practical continuous power in a open-frame design with sufficient drain pattern as a heat sink at

50

Comparison between SF1539 and SF1539HT

Parameter or Function

SF1539

SF1539HT

PWM Switching Frequency

50KHz

65KHz

External OTP Protection

No

Yes

Marking Information

YWW: Year&Week code