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UC3842BP-S08-R 数据表(PDF) 4 Page - Unisonic Technologies

部件名 UC3842BP-S08-R
功能描述  HIGH PERFORMANCE CURRENT MODE CONTROLLERS
PDF  10 Pages
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制造商  UTC [Unisonic Technologies]
网页  http://www.utc-ic.com
标志 UTC - Unisonic Technologies

UC3842BP-S08-R 数据表(HTML) 4 Page - Unisonic Technologies

  UC3842BP-S08-R Datasheet HTML 1Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 2Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 3Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 4Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 5Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 6Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 7Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 8Page - Unisonic Technologies UC3842BP-S08-R Datasheet HTML 9Page - Unisonic Technologies Next Button
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UC3842B/3843B
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
4 of 10
www.unisonic.com.tw
QW-R103-012.E
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ERROR AMPLIFIER SECTION
Voltage Feedback Input
VFB
Vo=2.5V
2.42
2.50
2.58
V
Input Bias Current
II(BIAS)
VFB=5.0V
-0.1
-2.0
μA
Open Loop Voltage Gain
GVO
2 ≤VO≤4V
65
90
dB
Unity Gain Bandwidth
GBW
TJ =25℃
0.7
1.0
MHz
Power Supply Rejection Ratio
PSRR
I2V≤VCC≤25V
60
70
dB
Output Sink Current
ISINK
VO=1.1V,VFB =2.7V
2.0
12
mA
Output Source Current
ISOURCE
VO=5.0V,VFB=2.3V
-0.5
-1.0
mA
Output Voltage Swing High State
VOH
VFB=2.3V, RL=15k to GND
5.0
6.2
V
Output Voltage Swing Low State
VOL
VFB=2.7V, RL=15k to VREF
0.8
1.1
V
CURRENT SENSE SECTION
Current Sense Input Voltage Gain
GV
(Note 2, 3)
2.85
3.0
3.15
V/V
Maximum Current Sense Input
Threshold
VI(THR)
(Note 2)
0.9
1.0
1.1
V
Power Supply Rejection Ratio
PSRR
12≤Vcc≤25V (Note 2)
70
dB
Input Bias Current
II(BIAS)
-2
-10
μA
Propagation Delay
tD(IN/OUT)
Current Sense Input to Output
150
300
ns
OUTPUT SECTION
Output Low Voltage
VOL
ISINK=20mA
0.1
0.4
V
ISINK=200mA
1.6
2.2
V
Output High Voltage
VOH
ISOURCE=20mA
13
13.5
V
ISOURCE=200mA
12
13.4
V
Output Voltage with UVLO
Activated
VOL (UVLO) VCC=6.0V,ISINK=1.0mA
0.1
1.1
V
Output Voltage Rise Time
tR
TJ =25℃,CL=1nF
50
150
ns
Output Voltage Fall Time
tF
TJ =25℃,CL=1nF
50
150
ns
UNDER-VOLTAGE LOCKOUT SECTION
Startup Threshold
VTHR
UC3842B
14.5
16
17.5
V
UC3843B
7.8
8.4
9
V
Min. Operating Voltage After
Turn-on(VCC)
VCC(MIN)
UC3842B
8.5
10
11.5
V
UC3843B
7.0
7.6
8.2
V
PWM SECTION
Duty Cycle
MAX
DC
94
96
%
MIN
0
%
Total DEVICE
Power Startup Supply Current
ICC+IC
VCC=6.5V for UC3843B
VCC=14V for UC3842B
0.3
0.5
mA
Power Operating Supply Current
ICC+IC
Note 1
12
17
mA
Power Supply Zener Voltage
VZ
ICC=25mA
30
36
V
Note: 1.
2.
Adject VCC above the Startup threshold before setting to 15V.
This parameter is measured at the latch trip point with VFB=0V.
3. Comparator gain is defined as : GV Δ
V Output Compensation
ΔV Current Sense Input



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