- 您现在的位置：买卖IC网 > PDF目录225404 > UC3827Q-1 (TEXAS INSTRUMENTS INC) 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PQCC28 PDF资料下载
参数资料
| 型号： | UC3827Q-1 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PQCC28 |
| 封装： | PLASIC, LCC-28 |
| 文件页数： | 11/16页 |
| 文件大小： | 391K |
| 代理商： | UC3827Q-1 |
SLUS365D
– APRIL 1999 – REVISED APRIL 2011
ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise spsecified, VVCC = 15 V, VV+ = 14.3 V, CCT = 340 pF, RRT = 10 k, RDELAY = 24.3 k, VSRC = VGND = VBUCK=
VPUSH = VPULL outputs no load, TJ = TA
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT ERROR AMPLIFIER
IB
–1
–5
A
VIO
10
mV
AVOL
80
110
dB
GBW(2)
Gain bandwidth
At 100 kHz, Measure Gain
2
4.5
MHz
VOL
ICEAO = 0 A (No Load)
0.25
0.5
V
VOH
ICEAO = 0 A (No Load)
3.3
3.5
V
CMRR
Common mode range(2)
-0.3
5
V
OSCILLATOR SECTION
fOSC
Frequency
180
220
250
kHz
ICT(dsch)
CT discharge current
3.5V at CT when CT removed
5
mA
PWM COMPARATOR
DMAX
Minimum duty cycle
200 kHz
0%
DMAX
Maximum duty cycle
200 kHz
85%
91%
95%
BUCK OUTPUT STAGE
tRISE
Rise time
1 nF Load(3)
40
100
ns
tFALL
Fall tIme
1 nF, Load
30
80
ns
IBUCK = –15 mA , V+ –BUCK
(4)
1.5
2.5
V
VOH
High-level output voltage
IBUCK =
–150 mA, V+ –BUCK (4)
2
2.5
V
IBUCK = 15 mA
(5)
0.2
0.4
V
VOL
Low-level output voltage
IBUCK = 150 mA
(5)
0.7
1.2
V
PUSH/PULL OUTPUT STAGES
tRISE
Rise time
1 nF load
50
100
ns
tFALL
Fall tIme
1 nF load
35
100
ns
Overlap time
UCx827-1
1 nF loads(6)
100
250
400
ns
Nonoverlapping time (7)
UCx827-2
100
250
500
ns
IPUSH/PULL = –10 mA, VCC – PUSH
2
3
V
(8)
VOH
High-level output voltage
IPUSH/PULL = –100 mA, VCC –
2.5
3
V
PUSH(8)
IPUSH/PULL = 10 mA
(8)
0.2
0.8
V
VOL
Low-level output voltage
IPUSH/PULL = 100 mA
(8)
0.6
1.2
V
REFERENCE
Reference voltage
4.8
5
5.2
V
ISC
Shor-circuit current
VREF = 0V
–35
–50
–65
mA
Line regulation
0.5V
< VVCC < 20 V
5
20
mV
Load regulation
0 mA
< IIO < 10 mA
8
20
mV
SOFT START
VOL
Low-level output voltage saturation
VVCC = 7 V
250
500
mV
ISS
Soft-start current
–5
–12
–25
A
(2)
Ensured by design. Not production tested.
(3)
Measure the rise time from when BUCK crosses 1 V until it crosses 9 V.
(4)
To force BUCK high, force VCSAO=2.5 V, VCEAO = 2.5 V, a 25-k pulldown resistor from RAMP to ground, and VCT = 0.5 V.
(5)
To force BUCK low, force VCSAO = 2.5 V, VCEAO = 2.5 V, a 10-k pulldown resistor from RAMP to ground, and VCT = 3.5 V.
(6)
The overlap time is measured from the point at which the rising edge of PUSH/PULL crosses 5 V until the falling edge of PULL/PUSH
crosses 5V.
(7)
The non-overlap time is measured from the point at which the falling edge of PUSH/PULL crosses 5 V until the rising edge of
PULL/PUSH crosses 5 V.
(8)
To toggle PUSH or PULL into a desired state, pulse CT from 0.5 V to 3.5 V. PUSH and PULL toggle on the rising edge of CT.
4
Copyright
1999–2011, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| UC3842ADX | |
| UC3843ADX | |
| UC3843ADW | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| UC3843D1X | |
| UC3844D1X | |
相关代理商/技术参数 |
参数描述 |
|---|---|
| UC3827Q-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current/Voltage-Mode SMPS Controller |
| UC3827QTR-1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC3827QTR-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current/Voltage-Mode SMPS Controller |
| UC3828 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:新型电流型PWM芯片 |
| UC382-ADJ | 制造商:TI 制造商全称:Texas Instruments 功能描述:FAST LDO LINEAR REGULATOR |
发布紧急采购，3分钟左右您将得到回复。