UCSR3652S

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 10

www.unisonic.com.tw

QW-R129-017.C



PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

STARTUP SECTION

Startup Voltage

25

V

Startup Current

700

μA

SUPPLY SECTION

Turn-on Threshold Voltage

13.5 14.5

16

V

Turn-off Threshold Voltage

8.2

9

10.5

V

28

V

Operating Current

1.6

2

mA

Green-Mode Operating Current

1.3

mA

OSCILLATOR SECTION

Maximum Frequency

55

65

75

kHz

Minimum Frequency at CCM

17

kHz

Minimum Frequency at No-load

300

Hz

Frequency Hopping Range

△

f/freq

±5.0

%

Frequency Hopping Period

3

ms

INV SECTION

Reference Voltage for EA

1.97 2.00 2.03

V

Reference Voltage for CCM

0.5

V

Max. Cable Compensation Current

37

μA

CURRENT SENSE SECTION

Current Sense Threshold Voltage

870

900

930

mV

OCP Propagation Delay

90

200

nS

Leading Edge Blank Time

900

nS

Soft Start Time

10

mS

POWER MOSFET SECTION

MOSFET DS Breakdown Voltage

650

V

On Resistance

2.4

Ω

OTP SECTION

Threshold Temperature of OTP (Note 2)

+140

°C

Notes: 1. Maximum practical continuous power in an Adapter design with sufficient drain pattern as a heat sink, at

50°C ambient.

2. When the over-temperature protection is activated, the power system enters auto restart mode and output

is disabled.