CS3842B Datasheet, PDF (3/6 Pages) Cherry Semiconductor Corporation – Off-Line Current Mode PWM Control Circuit Off-Line Current Mode PWM Control Circuit

PARAMETER
s Output Section: continued
Rise Time
Fall Time
Output Leakage
Electrical Characteristics: continued
TEST CONDITIONS
MIN
T_J=25˚C, C_L=1nF (Note 2)
T_J=25˚C, C_L=1nF (Note 2)
UVLO Active, V_OUT=0
s Total Standby Current
Start-Up Current
Operating Supply Current
V_CC Zener Voltage
V_FB=V_Sense=0V R_T=10kΩ, C_T=3.3nF
I_CC=25mA
TYP
50
50
-0.01
0.3
11
34
MAX
UNITS
150
ns
150
ns
-10.00 µA
0.5
mA
17
mA
V
PARAMETER
TEST CONDITIONS
s Under-Voltage Lockout Section
Start Threshold
Min. Operating
Voltage
After Turn On
Notes: 1. Adjust V_CC above the start threshold before setting at 15V.
2. These parameters, although guaranteed, are not 100% tested
in production.
CS-3842B
CS-3843B
MIN TYP MAX MIN TYP MAX UNITS
14.5 16.0 17.5 7.8 8.4 9.0 V
8.5 10.0 11.5 7.0 7.6 8.2 V
3. Parameter measured at trip point of latch with V_FB=0.
4. Gain defined as:
A=
∆V_COMP
∆V_Sense
; 0 ≤ V_Sense ≤ 0.8V.
PACKAGE PIN #
8L PDIP/SO 14L SO Narrow
1
1
2
3
3
5
4
7
5
8
9
6
10
11
7
12
8
14
2,4,6,13
Package Pin Description
PIN SYMBOL
FUNCTION
COMP
V_FB
Sense
OSC
Gnd
Pwr Gnd
V_OUT
V_CCPwr
V_CC
V_REF
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 V_REF
Ground
Output driver Ground
Output drive pin
Output driver positive supply
Positive power supply
Output of 5V internal reference
No Connection
3