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UCC28070-Q1 参数 Datasheet PDF下载

UCC28070-Q1图片预览
型号: UCC28070-Q1
PDF下载: 下载PDF文件 查看货源
内容描述: 交错连续导通模式PFC控制器 [INTERLEAVING CONTINUOUS CONDUCTION MODE PFC CONTROLLER]
分类和应用: 功率因数校正控制器
文件页数/大小: 43 页 / 883 K
品牌: TI [ TEXAS INSTRUMENTS ]
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UCC28070-Q1  
SLUSA71A JULY 2010REVISED JUNE 2011  
www.ti.com  
TERMINAL FUNCTIONS (continued)  
NAME  
PIN #  
I/O  
DESCRIPTION  
Device Ground Reference. Connect all compensation and programming resistor and capacitor  
networks to this pin. Connect this pin to the system through a separate trace for high-current  
noise isolation.  
GND  
16  
I/O  
Phase B's Gate Drive. This limited-current output is intended to connect to a separate  
gate-drivedevice suitable for driving the Phase B switching component(s). The output voltage is  
typically clamped to 13.5 V.  
GDB  
SS  
17  
18  
O
I
Soft-Start and External Fault Interface. Connect a capacitor to GND on this pin to set the  
soft-start slew rate based on an internally-fixed 10-μA current source. The regulation reference  
voltage for VSENSE is clamped to VSS until VSS exceeds 3 V. Upon recovery from certain fault  
conditions a 1-mA current source is present at the SS pin until the SS voltage equals the  
VSENSE voltage. Pulling the SS pin below 0.6 V immediately disables both GDA and GDB  
outputs.  
Timing Resistor. Oscillator frequency programming pin. A resistor to GND sets the running  
frequency of the internal oscillator.  
RT  
19  
20  
I
I
Maximum Duty-Cycle Resistor. Maximum PWM duty-cycle programming pin. A resistor to GND  
DMAX  
sets the PWM maximum duty-cycle based on the ratio of RDMX/RRT  
.
8
Copyright © 20102011, Texas Instruments Incorporated  
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