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TL2842BDR-8 Datasheet(PDF) 6 Page - Texas Instruments

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No. de pieza TL2842BDR-8
Descripción Electrónicos  HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
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TL2842BDR-8 Datasheet(HTML) 6 Page - Texas Instruments

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Error-Amplifier Section Electrical Characteristics
Current-Sense Section Electrical Characteristics
TL284xB, TL384xB
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
SLVS610A – AUGUST 2006 – REVISED SEPTEMBER 2006
V
CC = 15 V
(1), R
T = 10 kΩ, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
TL284xB
TL384xB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP(2)
MAX
MIN
TYP(2)
MAX
Feedback input voltage
COMP = 2.5 V
2.45
2.5
2.55
2.42
2.5
2.58
V
Input bias current
–0.3
–1
–0.3
–2
µA
Open-loop voltage
VO = 2 V to 4 V
65
90
65
90
dB
amplification
Gain-bandwidth product
0.7
1
0.7
1
MHz
Supply-voltage rejection ratio VCC = 12 V to 25 V
60
70
60
70
dB
Output sink current
VFB = 2.7 V, COMP = 1.1 V
2
6
2
6
mA
Output source current
VFB = 2.3 V, COMP = 5 V
–0.5
–0.8
–0.5
–0.8
mA
VFB = 2.3 V,
High-level output voltage
5
6
5
6
V
RL = 15 kΩ to GND
VFB = 2.7 V,
Low-level output voltage
0.7
1.1
0.7
1.1
V
RL = 15 kΩ to GND
(1)
Adjust VCC above the start threshold before setting it to 15 V.
(2)
All typical values are at TJ = 25°C.
V
CC = 15 V
(1), R
T = 10 kΩ, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
TL284xB
TL384xB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP(2)
MAX
MIN
TYP(2)
MAX
Voltage amplification(3)(4)
2.85
3
3.15
2.85
3
3.15
V/V
Current-sense comparator
COMP = 5 V
0.9
1
1.1
0.9
1
1.1
V
threshold(3)
Supply-voltage rejection
VCC = 12 V to 25 V
70
70
dB
ratio(3)
Input bias current
–2
–10
–2
–10
µA
Delay time to output
VFB = 0 V to 2 V
150
300
150
300
ns
(1)
Adjust VCC above the start threshold before setting it to 15 V.
(2)
All typical values are at TJ = 25°C.
(3)
Measured at the trip point of the latch, with VFB at 0 V.
(4)
Measured between ISENSE and COMP, with the input changing from 0 V to 0.8 V.
6
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