參數(shù)資料
型號: NCV3843BV
廠商: ON SEMICONDUCTOR
英文描述: High Performance Current Mode Controllers(高性能電流模式控制器)
中文描述: 高性能電流模式控制器(高性能電流模式控制器)
文件頁數(shù): 12/20頁
文件大小: 369K
代理商: NCV3843BV
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
tSoft-Start
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
SoftStart
3600C in F
Figure 24. SoftStart Circuit
Figure 25. Adjustable Buffered Reduction of
Clamp Level with SoftStart
+
5.0V Ref
+
S
R
Q
(11)
(10)
(8)
Comp/Latch
(5)
R
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 overcurrent 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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCV3843BV_10 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Current Mode Controllers
NCV3843BVD1R2G 功能描述:電流型 PWM 控制器 ANA SMPS PWM CNTRLER RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 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 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
NCV3843BVDR2 功能描述:IC REG CTRLR PWM CM 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
NCV3843BVDR2G 功能描述:電流型 PWM 控制器 ANA PWM SWTCHING REG RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 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 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
NCV3845BVD1R2G 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Current Mode Controllers