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UCC2808D-1 其他数据使用手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
PWM控制器
封装:
SOIC-8
描述:
PWM 控制器，最高可达 200kHz，Texas InstrumentsTexas Instruments 的一系列脉冲宽度调制控制器和关联设备适用于各种应用和规格。### PWM (Pulse Width Modulation) Controllers, Texas Instruments
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UCC2808D-1数据手册
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若手册格式错乱，请下载阅览PDF原文件
COMP
CS
CS
V
A ,0 V 0.4V
V
D
= £ £
D
(3) Gain is defined by: 0 v V
CS
v 0.4 V
UCC2808-1
,
UCC2808-2
,
UCC3808-1
,
UCC3808-2
www.ti.com
SLUS168E –APR 1999–REVISED AUGUST 2015
Electrical Characteristics (continued)
T
A
= 0°C to 70°C for the UCC3808-x, –40°C to 85°C for the UCC2808-x and –55°C to 125°C for the UCC1808-x, VDD = 10
V
(1)
, 1-μF capacitor from VDD to GND, R = 22 kΩ , C = 330 pF, T
A
= T
J
, (unless otherwise specified)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
COMP source current FB = 1.3 V, COMP = 3.5 V –0.25 –0.5 mA
PWM SECTION
Maximum duty cycle Measured at OUTA or OUTB 48% 49% 50%
Minimum duty cycle COMP = 0 V 0%
CURRENT SENSE SECTION
Gain
(3)
1.9 2.2 2.5 V/V
Maximum input signal COMP = 5 V
(4)
0.45 0.5 0.55 V
COMP = 3.5 V, CS from 0 to 600
CS to output delay 100 200 ns
mV
CS source current –200 nA
Over current threshold 0.7 0.75 0.8 V
COMP to CS offset CS = 0 V 0.35 0.8 1.2 V
OUTPUT SECTION
OUT low level I = 100 mA 0.5 1 V
OUT high level I = – 50 mA, VDD – OUT 0.5 1 V
Rise time C
L
= 1 nF 25 60 ns
Fall time C
L
= 1 nF 25 60 ns
UNDERVOLTAGE LOCKOUT SECTION
UCCx808-1
(1)
11.5 12.5 13.5
Start threshold V
UCCx808-2 4.1 4.3 4.5
UCCx808-1 7.6 8.3 9
Minimum operating voltage after
V
start
UCCx808-2 3.9 4.1 4.3
UCCx808-1 3.5 4.2 5.1
Hysteresis V
UCCx808-2 0.1 0.2 0.3
SOFT-START SECTION
COMP rise time FB = 1.8 V, rise from 0.5 V to 4 V 3.5 20 ms
OVERALL SECTION
Start-up current VDD < start threshold 130 260 µA
Operating supply current FB = 0 V, CS = 0 V
(5) (1)
1 2 mA
VDD zener shunt voltage IDD = 10 mA
(6)
13 14 15 V
(4) Parameter measured at trip point of latch with FB at 0 V.
(5) For UCCx808 – 1, set VDD above the start threshold before setting at 10 V
(6) Start threshold and Zener shunt threshold track one another.
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Product Folder Links: UCC2808-1 UCC2808-2 UCC3808-1 UCC3808-2
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