Electrical Characteristics: Unless otherwise stated, specifications apply for -40 ≤ TA ≤ 85˚C; VCC = 15V (Note 1); RT = 10kΩ;
CT = 3.3nF for sawtooth mode.
PARAMETER
ꢀ Total Standby Current
Start-Up Current
TEST CONDITIONS
MIN
TYP
MAX
UNIT
0.5
11
34
1.0
17
mA
mA
V
Operating Supply Current
VCC Zener Voltage
VFB=VSense=0V RT=10kΩ, CT=3.3nF
ICC=25mA
ꢀ PWM Section
Maximum Duty Cycle
Minimum Duty Cycle
46
0
48
50
%
%
ꢀ Undervoltage Lockout Section
Start Threshold
7.8
7.0
8.4
7.6
9.0
8.2
V
V
Min. Operating Voltage
After Turn On
Notes:
1. Adjust VCC above the start threshold before setting at 15V.
3. Parameter measured at trip point of latch with VFB=0.
∆VCOMP
2.These parameters, although guaranteed, are not 100% tested in production.
4. Gain defined as:
A =
; 0 ≤ VSense ≤ 0.8V.
∆VSense
Package Pin Description
PACKAGE PIN #
8L 14L
PIN SYMBOL
FUNCTION
SO Narrow SO Narrow
1
2
3
4
5
5
6
7
7
8
1
COMP
VFB
Error amp output, used to compensate error amplifier.
Error amp inverting input.
3
5
Sense
OSC
Noninverting input to Current Sense Comparator.
Oscillator timing network with Capacitor to Ground, resistor to VREF
Ground.
7
.
9
8
Gnd
Pwr Gnd
VOUT
VCCPwr
VCC
Output driver Ground.
10
Output drive pin.
11
Output driver positive supply.
Positive power supply.
12
14
VREF
Output of 5V internal reference.
No Connection.
2,4,6,13
NC
3
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
