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參數(shù)資料
| 型號： | UC3845-S08-R |
| 廠商： | UNISONIC TECHNOLOGIES CO LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 5/7頁 |
| 文件大小： | 307K |
| 代理商： | UC3845-S08-R |
UC3844/45
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 7
QW-R103-010,C
ELECT RICAL CHARACT ERIST ICS (Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT SENSE SECTION
Current Sense Input Voltage Gain
(Note 2 & 3)
Maximum Current Sense Input
Threshold (Note 2)
Input Bias Current
Power Supply Rejection Ratio
Propagation Delay
OUTPUT SECTION
G
V
2.85
3.0
3.15
V/V
V
I(THR)
0.9
1.0
1.1
V
I
I(BIAS)
PSRR
t
PLH(IN/OUT)
V
CC
=12V ~ 25V (Note4)
-2.0
70
150
-10
300
μ
A
dB
ns
I
SINK
=20mA
I
SINK
=200mA
I
SINK
=20mA
I
SINK
=200mA
V
CC
=6.0V, I
SINK
=1.0mA
C
L
=1.0nF,T
J
=25
°
C
C
L
=1.0nF,T
J
=25
°
C
0.1
1.6
13.5
13.4
0.1
50
50
0.4
2.2
1.1
150
150
Low
V
OL
V
13
12
Output Voltage
High
V
OH
V
Output Voltage with U
VLO
Activated
Output Voltage Rise Time
Output Voltage Fall Time
UNDERVOLTAGE LOCKOUT SECTION
V
OL
(U
VLO
)
t
R
t
F
V
ns
ns
UC3844
UC3845
UC3844
UC3845
14.5
7.8
8.5
7.0
16.0
8.4
10.0
7.6
17.5
9.0
11.5
8.2
Startup Threshold
V
THR
V
Minimum Operating
Voltage After Turn-On
PWM SECTION
V
CC(MIN)
V
Max
Min
DC
MAX
DC
MIN
47
48
50
0
%
%
Duty Cycle
TOTAL DEVICE
Power Supply Zener Voltage
Power Supply Current
(Note 4)
Note: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient
as possible.
2. This parameter is measured at the latch trip point with V
FB
=0V.
3. Comparator gain is defined as:
Δ
V Output Compensation
A
V
=
Δ
V Current Sense Input
4. Adjust V
CC
above the startup threshold before setting to 15V.
V
Z
I
CC
=25mA
V
CC
=6.5V
V
CC
=14V
30
36
0.5
12
-
V
UC3845
UC3844
1.0
17
I
CC
mA
相關PDF資料 |
PDF描述 |
|---|---|
| UC3845-S08-T | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3844L-D08-T | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3844L-S08-R | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3845A | High Performance Current Mode PWM Controller(高性能電流模式PWM控制器) |
| UC3845B | High Performance Current Mode PWM Controller(高性能電流模式PWM控制器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UC3845-S08-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3845T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER |
| UC3845TD | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER |
| UC3845TN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| UC3845W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
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