UC3842BP Просмотр технического описания (PDF) - Unisonic Technologies
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UC3842BP Datasheet PDF : 11 Pages
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UC3842B/3843B
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage Swing Low State
CURRENT SENSE SECTION
VOL
VFB=2.7V, RL=15k to VREF
Current Sense Input Voltage Gain GV (Note 3,4)
Maximum Current Sense Input
Threshold
VI(THR)
(Note 3)
Power Supply Rejection Ratio
PSRR 12≤Vcc≤25V (Note 3)
Input Bias Current
II(BIAS)
Propagation Delay
OUTPUT SECTION
tD(IN/OUT) Current Sense Input to Output
Output Low Voltage
VOL
ISINK=20mA
ISINK=200mA
Output High Voltage
VOH
ISOURCE=20mA
ISOURCE=200mA
Output Voltage with UVLO
Activated
VOL (UVLO) VCC=6.0V,ISINK=1.0mA
Output Voltage Rise Time
Output Voltage Fall Time
tR
TJ =25°C,CL=1nF
tF
TJ =25°C,CL=1nF
UNDER-VOLTAGE LOCKOUT SECTION
Startup Threshold
VTHR
UTC UC3842B
UTC UC3843B
Min. Operating Voltage After
Turn-on(Vcc)
UTC UC3842B
VCC(MIN) UTC UC3843B
PWM SECTION
Duty Cycle
MAX
DC
MIN
Total DEVICE
Power Startup Supply Current
ICC+IC
VCC=6.5V for UC3843B
VCC=14V for UC3842B
Power Operating Supply Current ICC+IC Note2
Power Supply Zener Voltage
VZ
ICC=25mA
Note: 1. Maximum Package power dissipation limits must be observed.
2. Adject VCC above the Startup threshold before setting to 15V.
3. This parameter is measured at the latch trip point with VFB=0V.
4.
Comparator gain is defined as : GV
ΔV Output Compensation
ΔV Current Sense Input
MIN TYP MAX UNIT
0.8 1.1
V
2.85 3.0 3.15 V/V
0.9 1.0 1.1
V
70
dB
-2 -10 μA
150 300 ns
0.1 0.4
V
1.6 2.2
V
13 13.5
V
12 13.4
V
0.1 1.1
V
50 150 ns
50 150 ns
14.5 16 17.5 V
7.8 8.4
9
V
8.5 10 11.5 V
7.0 7.6 8.2
V
94 96
%
0
%
0.3 0.5 mA
12 17 mA
30 36
V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 11
QW-R103-012.D
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