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ICE3BS03LJG 参数 Datasheet PDF下载

ICE3BS03LJG图片预览
型号: ICE3BS03LJG
PDF下载: 下载PDF文件 查看货源
内容描述: 离线式开关电源电流模式控制器,集成500V启动电池 [Off-Line SMPS Current Mode Controller with integrated 500V Startup Cell]
分类和应用: 电池开关控制器
文件页数/大小: 25 页 / 492 K
品牌: INFINEON [ Infineon ]
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F3 PWM controller  
ICE3BS03LJG  
Functional Description  
reset. Thus it is ensured that at every startup cycle the  
soft start starts at zero.  
3.3  
Improved Current Mode  
Soft-Start Comparator  
HV  
VCC  
Startup Cell  
PWM-Latch  
FB  
R
Q
C8  
Driver  
S
Q
Power Management  
0.6V  
Undervoltage Lockout  
18V  
Internal Bias  
10.5V  
Latched Off Mode  
Reset  
PWM OP  
x3.2  
VVCC < 6.23V  
5.0V  
Voltage  
Power-Down Reset  
CS  
Reference  
Improved  
Current Mode  
Auto Restart  
Mode  
Soft Start block  
Active Burst  
Mode  
Figure 4  
Current Mode  
Current Mode means the duty cycle is controlled by the  
slope of the primary current. This is done by comparing  
the FB signal with the amplified current sense signal.  
Latched Off  
Mode  
Figure 3  
Power Management  
Amplified Current Signal  
FB  
The internal bias circuit is switched off if Latched Off  
Mode or Auto Restart Mode is entered. The current  
consumption is then reduced to 250µA.  
Once the malfunction condition is removed, this block  
will then turn back on. The recovery from Auto Restart  
Mode does not require re-cycling the AC line. In case  
Latched Off Mode is entered, VCC needs to be  
dropped below 6.23V to reset the Latched Off Mode.  
This is done usually by re-cycling the AC line.  
When Active Burst Mode is entered, the internal Bias is  
switched off most of the time but the Voltage Reference  
is kept alive in order to reduce the current consumption  
below 450µA.  
0.6V  
Driver  
t
t
Ton  
Figure 5  
Pulse Width Modulation  
In case the amplified current sense signal exceeds the  
FB signal, the on-time Ton of the driver is finished by  
resetting the PWM-Latch (see Figure 5).  
The primary current is sensed by the external series  
resistor RSense inserted in the source of the external  
power MOSFET. By means of Current Mode  
regulation, the secondary output voltage is insensitive  
Version 2.0  
8
6 Dec 2007