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UCC3805NG4 Datasheet(PDF) 8 Page - Texas Instruments

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Part # UCC3805NG4
Description  Low-Power BiCMOS Current-Mode PWM Controllers
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

UCC3805NG4 Datasheet(HTML) 8 Page - Texas Instruments

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UCC1800, UCC1801, UCC1802, UCC1803, UCC1804, UCC1805
UCC2800, UCC2801, UCC2802, UCC2803, UCC2804, UCC2805
UCC3800, UCC3801, UCC3802, UCC3803, UCC3804, UCC3805
SLUS270E – MARCH 1999 – REVISED JUNE 2016
www.ti.com
Product Folder Links: UCC1800 UCC1801 UCC1802 UCC1803 UCC1804 UCC1805 UCC2800 UCC2801 UCC2802
UCC2803 UCC2804 UCC2805 UCC3800 UCC3801 UCC3802 UCC3803 UCC3804 UCC3805
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Copyright © 1999–2016, Texas Instruments Incorporated
Electrical Characteristics (continued)
–55°C
≤ TA ≤ 125°C for UCC180x, –40°C ≤ TA ≤ 85°C for UCC280x, and 0°C ≤ TA ≤ 70°C for UCC380x. VCC = 10 V
(1), RT =
100 k from REF to RC, CT = 330 pF from RC to GND, 0.1-pF capacitor from VCC to GND, 0.1-pF capacitor from VREF to GND,
and TA= TJ (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
(5)
Gain is defined by: A = ΔVCOMP / Δ VCS. 0 ≤ VCS ≤ 0.8 V
(6)
Parameter measured at trip point of latch with Pin 2 at 0 V.
(7)
Start threshold, stop threshold, and Zener shunt thresholds track one another.
(8)
The device is fully operating in clamp mode, as the forcing current is higher than the normal operating supply current.
PWM
Maximum duty cycle
UCCx800, UCCx802, and UCCx803
97%
99%
100%
UCCx801, UCCx804, and UCCx805
48%
49%
50%
CURRENT SENSE
Gain(5)
1.1
1.65
1.8
V/V
Maximum input signal
COMP = 5 V(6)
0.9
1
1.1
V
Input bias current
–200
200
nA
CS blank time
50
100
150
ns
Overcurrent threshold
1.42
1.55
1.68
V
COMP to CS offset
CS = 0 V
0.45
0.9
1.35
V
OUTPUT
OUT low level
I = 20 mA, all parts
0.1
0.4
V
I = 200 mA, all parts
0.35
0.9
I = 50 mA, VCC = 5 V, UCCx803 and UCCx805
0.15
0.4
I = 20 mA, VCC = 0 V, all parts
0.7
1.2
OUT high VSAT (VCC-OUT)
I = 20 mA, all parts
0.15
0.4
V
I = 200 mA, all parts
1
1.9
I = 50 mA, VCC = 5 V, UCCx803 and UCCx805
0.4
0.9
Rise time
CL = 1 nF
41
70
ns
Fall time
CL = 1 nF
44
75
ns
UNDERVOLTAGE LOCKOUT
Start threshold(7)
UCCx800
6.6
7.2
7.8
V
UCCx801
8.6
9.4
10.2
UCCx802 and UCCx804
11.5
12.5
13.5
UCCx803 and UCCx805
3.7
4.1
4.5
Stop threshold(7)
UCCx1800
6.3
6.9
7.5
V
UCCx1801
6.8
7.4
8
UCCx802 and UCCx804
7.6
8.3
9
UCCx803 and UCCx805
3.2
3.6
4
Start to stop hysteresis
UCCx800
0.12
0.3
0.48
V
UCCx801
1.6
2
2.4
UCCx802 and UCCx804
3.5
4.2
5.1
UCCx803 and UCCx805
0.2
0.5
0.8
SOFT START
COMP rise time
FB = 1.8 V, rise from 0.5 V to REF – 1 V
4
10
ms
OVERALL
Start-up current
VCC < start threshold
0.1
0.2
mA
Operating supply current
FB = 0 V, CS = 0 V
0.5
1
mA
VCC internal Zener voltage
ICC = 10 mA
(7) (8)
12
13.5
15
V
VCC internal Zener voltage minus
start threshold voltage
UCCx802 and UCCx804(7)
0.5
1
V


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