参数资料
型号: HIP6013CB
厂商: Intersil
文件页数: 10/11页
文件大小: 0K
描述: IC CONTROLLER PWM BUCK 14-SOIC
标准包装: 50
应用: 控制器,Intel Pentium? Pro、PowerP、Alpha
输入电压: 5V,12V
输出数: 1
输出电压: 1.3 V ~ 12 V
工作温度: 0°C ~ 70°C
安装类型: *
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: *
包装: 管件
HIP6013
+12V
HIP6013
VCC
BOOT
+5V OR LESS
Q1
Schottky Selection
Rectifier D2 conducts when the upper MOSFET Q1 is off.
The diode should be a Schottky type for low power losses.
The power dissipation in the Schottky rectifier is
approximated by:
UGATE
PHASE
NOTE:
V G-S ≈ V CC - 5V
P COND = I O x V f x (1 - D)
Where: D is the duty cycle = V O /V IN , and
V f is the schottky forward voltage drop
D2
-
+
GND
FIGURE 10. UPPER GATE DRIVE - DIRECT V CC DRIVE OPTION
10
In addition to power dissipation, package selection and
heatsink requirements are the main design tradeoffs in
choosing the Schottky rectifier. Since the three factors are
interrelated, the selection process is an iterative procedure.
The maximum junction temperature of the rectifier must
remain below the manufacturer’s specified value, typically
125 o C. By using the package thermal resistance specification
and the Schottky power dissipation equation (shown above),
the junction temperature of the rectifier can be estimated. Be
sure to use the available airflow and ambient temperature to
determine the junction temperature rise.
4325.1
November 3, 2005
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