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CS52843ED14

Current Mode PWM Control Circuit

Cherry semiconductor 

Electrical Characteristics: -40 ≤ TA ≤ 85˚C; VCC = 15V (Note 1); RT = 680Ω; CT = .022µF for triangle mode,

RT = 10kΩ; CT = 3.3nF sawtooth mode unless otherwise stated.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

Rise Time

Fall Time

Output Leakage

TJ = 25˚C, CL = 1nF (Note 1)

TJ=25˚C, CL=1nF (Note 1)

UVLO Active VOUT = 0

50

150

50

150

-.01

-10.0

UNIT

ns

ns

µA

s Total Standby Current

Start-Up Current

Operating Supply Current

VCC Zener Voltage

VFB=VSense=0V RT=10kΩ, CT=3.3nF

ICC=25mA

300

500

µA

11

17

mA

34

V

s Undervoltage Lockout Section

Start Threshold

Min. Operating Voltage

After Turn On

7.8

8.4

9.0

V

7.0

7.6

8.2

V

Notes:

1.These parameters, although guaranteed, are not 100% tested in production.

2. Parameter measured at trip point of latch with VFB=0.

3. Gain defined as: A =

∆VCOMP

∆VSense

; 0 ≤ VSense ≤ 0.8V.

PACKAGE PIN #

8L

14L

SO Narrow SO Narrow

1

1

2

3

3

5

4

7

5

8

5

9

6

10

7

11

7

12

8

14

2,4,6,13

Package Pin Description

PIN SYMBOL

FUNCTION

COMP

VFB

Sense

OSC

Gnd

Pwr Gnd

VOUT

VCCPwr

VCC

VREF

NC

Error amp output, used to compensate error amplifier.

Error amp inverting input.

Noninverting input to Current Sense Comparator.

Oscillator timing network with Capacitor to Ground, resistor to VREF.

Ground.

Output driver Ground.

Output drive pin.

Output driver positive supply.

Positive power supply.

Output of 5V internal reference.

No Connection.

3

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