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UC2842AQD8R 데이터시트(PDF) 5 Page - Texas Instruments

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부품명 UC2842AQD8R
상세설명  CURRENT-MODE PWM CONTROLLER
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UC2842AQD8R 데이터시트(HTML) 5 Page - Texas Instruments

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UC2842AQ, UC2843AQ, UC2844AQ, UC2845AQ
CURRENT-MODE PWM CONTROLLER
SGLS164 – APRIL 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics, TA = –40_C to 125_C, VCC = 15 V (see Note 1), RT = 10 kΩ, CT = 3.3 nF, and
TA = TJ (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Error Amplifier Section
Input voltage
COMP = 2.5 V
2.45
2.5
2.55
V
Input bias current
–0.3
–1
µA
Open loop voltage gain (AVOL)
VO = 2 V to 4 V
65
90
dB
Unity gain bandwidth
See Note 2
TJ = 25_C
0.7
1
MHz
PSRR
VCC = 12 V to 25 V
60
70
dB
Output sink current
FB = 2.7 V,
COMP = 1.1 V
2
6
mA
Output source current
FB = 2.3 V,
COMP = 5 V
–0.5
–0.8
mA
VOUT high
FB = 2.3 V,
RL = 15 kΩ to GND
5
6
V
VOUT low
FB = 2.7 V,
RL = 15 kΩ to VREF
0.7
1.1
V
Current Sense Section
Gain
See Notes 6 and 7
2.85
3
3.15
V/V
Maximum input signal
COMP = 5 V,
See Note 6
0.9
1
1.1
V
PSRR
VCC = 12 V to 25 V,See Note 6
70
dB
Input bias current
–2
–10
µA
Delay to output
ISENSE = 0 V to 2 V,
See Note 2
150
300
ns
Output Section (OUT)
Low level output voltage
IOUT = 20 mA
0.1
0.4
V
Low-level output voltage
IOUT = 200 mA
15
2.2
V
High level output voltage
IOUT = –20 mA
13
13.5
V
High-level output voltage
IOUT = –200 mA
12
13.5
V
Rise time
CL = 1 nF,
See Note 2
TJ = 25_C
50
150
ns
Fall time
CL = 1 nF,
See Note 2
TJ = 25_C
50
150
ns
UVLO saturation
VCC = 5 V,
IOUT = 10 mA
0.7
1.2
V
Undervoltage Lockout Section
Start threshold
UC2842A,
UC2844A
15
16
17
V
Start threshold
UC2843A,
UC2845A
7.8
8.4
9
V
Minimum operation voltage after turn on
UC2842A,
UC2844A
9
10
11
V
Minimum operation voltage after turn on
UC2843A,
UC2845A
7
7.6
8.2
V


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