SDC4563 datasheet(6/13 Pages) SDC

6 / 13 page

Datasheet

December, 2013 Rev. 1.1

6/13

2013 Shaoxing Devechip Microelectronics Co., Ltd.

www.sdc-semi.com

Current Mode PWM Controller

SDC4563

Electrical Characteristics (Ta=25°C, unless otherwise specified)

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Supply Voltage (VDD)

VDD start up current

ISTART

VDD=12.5V, RI=100k

Operation current

IDD

VDD=16V, RI=100k, VFB=3V

1.4

VDD under voltage lockout

(enter)

VUVLO(ON)

7.8

8.8

9.8

VDD under voltage lockout (exit)

VUVLO(OFF)

VDD clamp voltage

VDD_CLAMP

ICLAMP =10mA

Feedback Input Section(FB Pin)

PWM input gain

AVCS

△

VFB/△VCS

2.0

V/V

FB open loop voltage

VFB_OPEN

4.8

FB pin short circuit current

IFB_SHORT

Short FB pin to GND and

Measure Current

0.8

Input impedance

ZFB

kΩ

Zero duty cycle FB threshold

voltage

VFB_0D

VDD=16V, RI=100k

0.75

Power limiting fb threshold

voltage

VFB_PL

3.7

Power limiting debounce time

tFB_PL

Maximum duty cycle

DCMAX

VDD=18V, RI=100k,

FB=3V, CS=0

Current Sense Input(Sense Pin)

Leading edge blanking time

TLEB

RI=100k

300

Input impedance

ZSENSE

kΩ

Over current detection and

control delay

tD_OC

VDD=16V,

CS> VTH_OC, FB=3.3V

Over current threshold voltage at

zero duty cycle

VTH_OC

FB=3.3V, RI=100k

0.70

0.75

0.80

Oscillator

Normal oscillation frequency

fOSC

RI =100K

kHz

Frequency temperature stability

△

fTEMP

VDD=16V, RI=100k,

Ta=-20°C~100°C

Frequency voltage stability

△

fVDD

VDD=12V~25V, RI=100k

SDC

CONFIDENTIAL

DOCUMENT

SDC4563 Datasheet(PDF) 6 Page - Shaoxing Devechip Microelectronics Co., Ltd

SDC4563 Datasheet(HTML) 6 Page - Shaoxing Devechip Microelectronics Co., Ltd

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13

Datasheet Download

Link URL