CS2842A Datasheet, PDF (3/6 Pages) Cherry Semiconductor Corporation – Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout

Electrical Characteristics: continued
PARAMETER
TEST CONDITIONS
s Output Section: continued
Rise Time
Fall Time
Output Leakage
T_J = 25˚C, C_L = 1nF (Note 2)
T_J = 25˚C, C_L = 1nF (Note 2)
UVLO Active, V_OUT = 0
CS2842A/CS2843A CS3842A/CS3843A
MIN TYP MAX MIN TYP MAX UNITS
50
50
-0.01
150
150
-10.00
50 150 ns
50 150 ns
-0.01 -10.00 µA
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 11
I_CC = 25mA
0.5 1.0
17
11
34
0.5 1.0 mA
17 mA
34
V
PARAMETER
TEST CONDITIONS
s Under-Voltage Lockout Section
Start Threshold
Min. Operating After Turn On
Voltage
CS2842A
CS3842A
CS2843A/CS3843A
MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
15 16 17 14.5 16.0 17.5 7.8 8.4 9.0 V
9
10 11 8.5 10.0 11.5 7.0 7.6 8.2 V
Notes: 1. Adjust V_CC above the start threshold before setting at 15V.
2.These parameters, although guaranteed, are not 100% tested in production.
3. Parameter measured at trip point of latch with VFB=0.
4. Gain defined as:
∆V_COMP
A=
; 0 ≤ VSense ≤ 0.8V.
∆V_Sense
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