Low

TEXAS INSTRUMENTS  UCC38500DW..  IC, PFC/PWM CONTROLLER 20-SOIC

TEXAS INSTRUMENTS UCC38500DW..
Technical Data Sheet (10.08KB) EN 查看所有技術文件

圖片僅供舉例說明。 請參閱產品描述。

產品總覽

The UCC38500DW is a BiCMOS PFC/PWM Combination Controller provides all of the control functions necessary for an active power-factor-corrected pre-regulator and a second-stage DC to DC converter. The controller achieves near-unity power factor by shaping the ac input line current waveform to correspond to the ac input-line voltage using average current-mode control. The DC to DC converter uses peak current-mode control to perform the step-down power conversion. The PFC stage is leading-edge modulated while the second stage is trailing-edge synchronized to allow for minimum overlap between the boost and PWM switches. This reduces ripple current in the bulk-output capacitor. In order to operate with over three-to-one range of input-line voltages, a line feed-forward (VFF) is used to keep input power constant with varying input voltage. Generation of VFF is accomplished using IAC in conjunction with an external single-pole filter.
  • Combines PFC and downstream converter controls
  • Controls boost preregulator to near-unity power factor
  • Accurate power limiting
  • Improved feedforward line regulation
  • Peak current-mode control in second stage
  • Programmable oscillator
  • Leading-edge/trailing-edge modulation for reduced output ripple
  • Low start-up supply current
  • Synchronized second stage start-up, with programmable soft-start
  • Programmable second stage shutdown
  • Green product and no Sb/Br

產品訊息

UVLO:
1.2V
Supply Voltage Min:
12V
Supply Voltage Max:
18V
Startup Current:
150µA
Operating Supply Current:
4mA
Controller IC Case Style:
SOIC
No. of Pins:
20Pins
Duty Cycle (%):
100%
Frequency:
100kHz
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Packaging:
Cut Tape
Product Range:
-
MSL:
MSL 2 - 1 year
SVHC:
No SVHC (15-Jun-2015)

按照共同屬性分組尋找類似產品 

應用

  • Power Management

法規與環境保護

濕敏等級:
MSL 2 - 1 year
原產地:
United States

承擔產品生產最後程序之國家

符合 RoHS 規定:
關稅編號:
85423190
重量 (公斤):
.004899

相關產品