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参数资料
| 型号： | APW7004 |
| 厂商： | Anpec Electronics Corporation |
| 英文描述： | Synchronous-Rectifier PWM Controller for Pentium II Microprocessor |
| 中文描述： | 同步整流PWM控制器，微处理器的奔腾II |
| 文件页数： | 5/10页 |
| 文件大小： | 100K |
| 代理商： | APW7004 |
Copyright
ANPEC Electronics Corp.
Rev. P.4 - Mar., 2001
APW 7004
www.anpec.com.tw
5
Electrical Characteristics Cont.
PGOOD (PIin 12)
PGOOD is an open collector output used to indicate
the status of the converter output voltage. This pin is
pulled low when the converter output is not within
±10% of the DACOUT reference voltage. The
PGOOD pin is floating when no CPU exists.
PHASE (pin 13)
Connect the PHASE pin to the source of the upper
MOSFET. This pin is used to monitor the voltage
drop across the upper MOSFET for over-current
protection.
UGATE (pin 14)
Connect UGATE to the upper MOSFET gate. This
pin enables the gate drive signal to drive the upper
MOSFET .
BOOT (pin 15)
BOOT pin provides bias voltage to the upper
MOSFET gate driver. A bootstrap circuit could be
used to pump a BOOT voltage for enforcing the driv-
ing capability of the gate driver and improving the
performance of the upper MOSFET.
PGND(pin 16)
PGND pin provides the power ground connection.
Connect this pin to the source of the lower MOSFET.
LGATE (pin 17)
Connect LGATE to the lower MOSFET gate. This pin
enables the gate drive signal to drive the lower
MOSFET.
V
CC
(pin 18)
Connect V
to 12V voltage supply. This pin sup-
plies the bias for the chip.
OVP (pin 19)
OVP pin reports the event of an over-voltage condi-
tion . Converter output rising 15% more than the DAC-
set voltage triggers a high output on this pin with a
typical 30mA sourcing capability which can be used
to drive an external device and disables PWM gate
drive circuitry.
RT (pin 20)
RT pin provides oscillator switching frequency
adujstment. By connecting a resistor (R
) from this
pin to GND, the nominal 200kHz switching frequency
is increased. Conversely. connecting a pull-up re-
sistor (R
) from this pin to V
CC
reduces the switching
frequency.
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