參數(shù)資料
型號(hào): ISL8102IRZ-T
廠商: INTERSIL CORP
元件分類: 穩(wěn)壓器
英文描述: Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
中文描述: SWITCHING CONTROLLER, PQCC32
封裝: 5 X 5 MM, ROHS COMPLIANT, PLASTIC, MO-220VHHD-2, MLFP-32
文件頁(yè)數(shù): 7/27頁(yè)
文件大小: 711K
代理商: ISL8102IRZ-T
7
FN9247.0
October 19, 2005
Timing Diagram
Simplified Power System Diagram
Functional Pin Description
VCC (Pin 3)
Bias supply for the IC’s small-signal circuitry. Connect this
pin to a +5V supply and locally decouple using a quality
1.0
μ
F ceramic capacitor.
PVCC (Pin 15)
Power supply pin for the MOSFET drive. This pin can be
connected to any voltage from +5V to +12V, depending on
the desired MOSFET gate drive level.
GND (Pin 33)
Bias and reference ground for the IC.
ENLL (Pin 20)
This pin is a threshold sensitive (approximately 0.66V) enable
input for the controller. Held low, this pin disables controller
operation. Pulled high, the pin enables the controller for
operation.
FS (Pin 29)
A resistor, placed from FS to ground, will set the switching
frequency. Refer to Equation 33 and Figure 24 for proper
resistor calculation.
2PH (Pin 31)
This pin is used to choose between single or two phase
operation. Tying this pin to VCC allows for 2-phase operation.
Tying the 2PH pin to GND causes the controller to operate in
a single phase mode.
REF0 and REF1 (Pins 30, 21)
These pins make up the 2-bit input that selects the fixed DAC
reference voltage. These pins respond to TTL logic
thresholds. The ISL8102 decodes these inputs to establish
UGATE
LGATE
t
FLGATE
t
PDHUGATE
t
RUGATE
t
FUGATE
t
PDHLGATE
t
RLGATE
CHANNEL1
+5V
IN
V
OUT
Q1
Q2
ISL8102
DAC
CHANNEL2
Q3
Q4
+12V
IN
ENLL
PGOOD
2
REF0,REF1
OVP
ISL8102
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PDF描述
ISL8102 Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
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