CM494 Datasheet, PDF (6/9 Pages) List of Unclassifed Manufacturers – ADVANCED REGULATING PULSE WIDTH MODULATOR

CM494
ADVANCED REGULATING PULSE WIDTH MODULATOR
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, over recommended operating free-air
temperature range. Vcc = 15V, f = 10Khz, TA=TJ
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
Output Section
Collector off-state current
Emitter off-state current
VCE = 40V, Vcc = 40V
Vcc = Vc = 40V, VE = 0
2 100 µA
-100 µA
Collector-Emitter
Saturation voltage
Common-Emitter
Emitter-follower
VE = 0, lc = 200mA
Vc =15 V, lE = -200mA
1.1 1.3
V
1.5 2.5
V
Output control input current
Vl = VREF
3.5 mA
PWM Comparator Section
Input threshold voltage (Pin 3)
Zero duty-cycle
4 4.5
V
Input sink current (Pin 3)
V (Pin 3) = 0.7V
0.3
0.7
mA
Steering Control
Input current
V (Pin 13) = 0.4V,Q1 ACTIVE
-200 µA
V (Pin 13) = 2.4V,Q2 ACTIVE
300 µA
Deadband
500
mA
Zener Diode Circuit（UC495A）
Breakdown voltage
Vcc = 45V, lz = 2mA
36
39 .45
V
Sink current
V (Pin 15) = 1V
0.2
0.3 0.6 mA
Total Device
Standby supply current
Pin 6 at VREF, All other inputs Vcc = 15V
and outputs open
Vcc = 40V
6 10 mA
9 15 mA
Under voltage lockout
3.5
6.5
V
Hysteresis
300
mV
Switching Characteristics（TA = 25℃）
Output voltage rise time
Common-emitter configuration
100 200 ns
Output voltage fall time
RL = 68Ω, CL= 15pF
25 100 ns
Output voltage rise time
Emitter-follower configuration
100 200 ns
Output voltage fall time
RL= 68Ω, CL= 15pF
40 100 ns
Note 1: Duration of the short circuit should not exceed one second.
Note 2: Frequency for other values of CT and RT is approximately f = 1.1/RTCT
Note 3: Standard deviation is measure of the statistical distribution about the mean as derived from the formula:
n
Σ(Xn -X)²
n=1
σ=
n-1
2000/12/29 Preliminary
Champion Microelectronic Corporation
Page 5