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參數(shù)資料
| 型號(hào)： | UC3842BVD1R2 |
| 英文描述： | I2C BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 12/20頁 |
| 文件大小： | 296K |
| 代理商： | UC3842BVD1R2 |
UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
http://onsemi.com
12
+
-
+
-
S
R
+
R
R
R
2R
VClamp
1.67
R2
R1
1
Ipk(max)
VClamp
RS
5.0V Ref
Q
Bias
Osc
EA
1.0V
5(9)
7(11)
6(10)
5(8)
3(5)
R
S
Q1
V
CC
V
in
1(1)
2(3)
4(7)
8(14)
R
1
V
Clamp
R
2
Where: 0
≤
V
Clamp
≤
1.0 V
C
MPSA63
tSoftStart
In 1
VC
3VClamp
C
R1R2
R1
R2
7(12)
1.0 mA
Comp/Latch
5.0V Ref
+
-
S
R
Q
Bias
+
1.0mA
Osc
R
R
R
2R
EA
1.0V
5(9)
1(1)
2(3)
4(7)
8(14)
C
1.0M
t
Soft-Start
≈
3600C in
μ
F
Figure 24. Soft–Start Circuit
Figure 25. Adjustable Buffered Reduction of
Clamp Level with Soft–Start
+
-
5.0V Ref
+
-
S
R
Q
(11)
(10)
(8)
Comp/Latch
(5)
R
S
1/4 W
V
CC
V
in
K
M
D
SENSEFET
G
S
Power Ground:
To Input Source
Return
Control Circuitry Ground:
To Pin (9)
Virtually lossless current sensing can be achieved with the implementation of a
SENSEFET power switch. For proper operation during over-current conditions, a
reduction of the I
pk(max)
clamp level must be implemented. Refer to Figures 23 and 25.
VPin 5
RSIpkrDS(on)
rDM(on)
RS
If: SENSEFET = MTP10N10M
R
S
= 200
Then : VPin5
0.075Ipk
(12)
Figure 26. Current Sensing Power MOSFET
+
-
5.0V Ref
+
-
S
R
Q
7(11)
6(10)
5(8)
3(5)
R
S
Q1
V
CC
V
in
C
R
The addition of the RC filter will eliminate instability caused by the leading
edge spike on the current waveform.
7(12)
Comp/Latch
Figure 27. Current Waveform Spike Suppression
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC3842BVDR2 | I2C BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR |
| UC3843BD1R2 | 10-line IPAD", EMI filter and ESD protection |
| UC3843BDR2 | 1-bit dual supply bus buffer level translator with A-side series resistor |
| UC3843BVD1R2 | 2-bit dual supply bus transceiver level translator with a side series resistor |
| UC3843BVDR2 | 4-bit dual supply bus buffer level translator with A side series resistor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3842BVD1R2G | 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/96% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3842BVDR2 | 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3842BVDR2G | 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/96% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3842BVN | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| UC3842CD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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