3

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Electrical Characteristics: continued

Package Pin Description

PACKAGE PIN #

PIN SYMBOL

FUNCTION

8L PDIP & SO

14L SO

1

1

COMP

Error amp output, used to compensate error amplifier

23

Error amp inverting input

3

5

Sense

Noninverting input in Current Sense Comparator

4

7

OSC

Oscillator timing network with Capacitor to Gnd, resistor

5

9

Gnd

Ground

610

Output drive pin

712

Positive power supply

814

Output of 5V internal reference

8

Pwr Gnd

Output driver Gnd

11

Output driver positive supply

2, 4, 6, 13

NC

No Connection

s Total Standby Current

Start-Up Current

300

500

µA

Operating Supply Current

11

17

mA

34

V

s PWM Section

Maximum Duty Cycle

46

48

50

%

Minimum Duty Cycle

0%

s Under-Voltage Lockout Section

Start Threshold

7.8

8.4

9.0

V

Min. Operating Voltage

After Turn On

7.0

7.6

8.2

V

Notes:

1. These parameters, although guaranteed, are not 100% test-

ed in production.

3. Gain defined as: A =

; 0

≤ V

∆V

COMP

∆V

Sense