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UC3846N Datasheet(PDF) 5 Page - Texas Instruments

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Part No. UC3846N
Description  Current Mode PWM Controller
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

UC3846N Datasheet(HTML) 5 Page - Texas Instruments

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UC1846, UC1847, UC2846
UC2847, UC3846, UC3847
www.ti.com
SLUS352C – JANUARY 1997 – REVISED DECEMBER 2015
6.5 Electrical Characteristics
TA=–55°C to +125°C for UC1846/7; –40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; VIN=15 V,
RT=10k, CT=4.7 nF, TA=TJ (unless otherwise noted)
UC1846/7
UC3846/7
UC2846/7
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
REFERENCE
Output Voltage
TJ = 25°C, IO = 1 mA
5.05
5.10
5.15
5.00
5.10
5.20
V
Line Regulation
VIN = 8 V to 40 V
5
20
5
20
mV
Load Regulation
IL = 1 mA to 10 mA
3
15
3
15
mV
Over Operating
Temperature Stability
0.4
0.4
mV/°C
Range, (1)
Line, Load, and
Total Output Variation
5.00
5.20
4.95
5.25
V
Temperature (1)
10 Hz
≤ f ≤10 kHz, TJ
Output Noise Voltage
100
100
µV
= 25°C(1)
TJ = 125°C, 1000
Long Term Stability
5
5
mV
Hrs(1)
Short Circuit Output Current
VREF = 0 V
–10
–45
–10
–45
mA
OSCILLATOR
Initial Accuracy
TJ = 25°C
39
43
47
39
43
47
kHz
Voltage Stability
VIN =8 V to 40 V
–1%
2%
–1%
2%
Over Operating
Temperature Stability
–1%
–1%
Range (1)
Sync Output High Level
3.9
4.35
3.9
4.35
V
Sync Output Low Level
2.3
2.5
2.3
2.5
V
Sync Input High Level
Pin 8 = 0 V
3.9
3.9
V
Sync Input Low Level
Pin 8 = 0 V
2.5
2.5
V
Sync Voltage = 3.9 V,
Sync Input Current
1.3
1.5
1.3
1.5
mA
Pin 8 = 0 V
ERROR AMPLIFIER
Input Offset Voltage
0.5
5
0.5
10
mV
Input Bias Current
–0.6
–1
–0.6
–2
µA
Input Offset Current
40
250
40
250
nA
Common Mode Range
VIN = 8 V to 40 V
0
VIN - 2 V
0
VIN - 2 V
V
ΔVO = 1.2 to 3 V, VCM
Open Loop Voltage Gain
80
105
80
105
dB
= 2 V
Unity Gain Bandwidth
TJ = 25°C
(1)
0.7
1.0
0.7
1.0
MHz
VCM = 0 V to 38 V,
CMRR
75
100
75
100
dB
VIN = 40 V
PSRR
VIN = 8 V to 40 V
80
105
80
105
dB
VID = –15 mV to -5 V,
Output Sink Current
2
6
2
6
mA
VPIN7 = 1.2 V
VID = 15 mV to -5 V,
Output Source Current
–0.4
–0.5
–0.4
–0.5
mA
VPIN7 = 2.5 V
High Level Output Voltage
RL = (Pin 7) 15 kΩ
4.3
4.6
4.3
4.6
V
Low Level Output Voltage
RL = (Pin 7) 15 kΩ
0.7
1
0.7
1
V
CURRENT SENSE AMPLIFIER
VPIN 3 = 0 V, Pin 1
Amplifier Gain
2.5
2.75
3.0
2.5
2.75
3.0
V
Open(2), (3)
(1)
These parameters, although ensured over the recommended operating conditions, are not 100% tested in production.
(2)
Parameter measured at trip point of latch with VPIN 5 = VREF, VPIN 6 = 0 V.
(3)
Amplifier gain defined as: G =
ΔVPIN7 / ΔVPIN4; VPIN4 = 0 to 1.0 V
Copyright © 1997–2015, Texas Instruments Incorporated
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Product Folder Links: UC1846 UC1847 UC2846 UC2847 UC3846 UC3847


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