參數(shù)資料
型號(hào): HIP6311CBZA
廠商: INTERSIL CORP
元件分類: 穩(wěn)壓器
英文描述: Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
中文描述: SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO20
封裝: LEAD FREE, PLASTIC, MS-013-AC, SOIC-20
文件頁數(shù): 16/17頁
文件大?。?/td> 449K
代理商: HIP6311CBZA
16
FN4817.3
December 27, 2004
dissipated by the Driver IC and don't heat the MOSFETs.
However, large gate-charge increases the switching time,
t
SW
which increases the upper MOSFET switching losses.
Ensure that both MOSFETs are within their maximum
junction temperature at high ambient temperature by
calculating the temperature rise according to package
thermal-resistance specifications. A separate heatsink may
be necessary depending upon MOSFET power, package
type, ambient temperature and air flow.
A diode, anode to ground, may be placed across Q2 and Q4.
These diodes function as a clamp that catches the negative
inductor swing during the dead time between the turn off of
the lower MOSFETs and the turn on of the upper MOSFETs.
The diodes must be a Schottky type to prevent the lossy
parasitic MOSFET body diode from conducting. It is usually
acceptable to omit the diodes and let the body diodes of the
lower MOSFETs clamp the negative inductor swing, but
efficiency could drop one or two percent as a result. The
diode's rated reverse breakdown voltage must be greater
than the maximum input voltage.
P
UPPER
I
------------------------------------------------------------
2
r
IN
×
V
×
I
---------------------------------------------------------
V
×
t
×
F
×
+
=
P
LOWER
I
--------------------------------------------------------------------------------
2
r
IN
×
V
V
(
)
×
=
HIP6311
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HIP6311CBZA-T 功能描述:電流型 PWM 控制器 W/ANL 2-4 PHS SYNCH BUCK CNTRLR 0 8%F RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
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