HIP6018B Ver la hoja de datos (PDF) - Renesas Electronics
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HIP6018B Datasheet PDF : 15 Pages
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HIP6018B
Functional Pin Description
VSEN1 (Pin 19)
This pin is connected to the PWM converter’s output voltage.
The PGOOD and OVP comparator circuits use this signal to
report output voltage status and for over voltage protection.
OCSET1 (Pin 20)
Connect a resistor (ROCSET) from this pin to the drain of the
upper MOSFET. ROCSET, an internal 200A current source
(IOCSET), and the upper MOSFET on-resistance (rDS(ON)) set
the PWM converter over-current (OC) trip point according to
the following equation:
IPEAK
=
I--O-----C----S----E----T---------R-----O----C-----S----E---T--
rDSON
An over-current trip cycles the soft-start function. Sustaining an
over-current for 2 soft-start intervals shuts down the controller.
SS (Pin 9)
Connect a capacitor from this pin to ground. This capacitor,
along with an internal 11A (typically) current source, sets the
soft-start interval of the converter. Pulling this pin low with an
open drain signal will shut down the IC.
VID0, VID1, VID2, VID3, VID4 (Pins 6, 5, 4, 3 and 2)
VID0-4 are the input pins to the 5-bit DAC. The states of these
five pins program the internal voltage reference (DACOUT).
The level of DACOUT sets the core converter output voltage. It
also sets the core PGOOD and OVP thresholds.
COMP1 and FB1 (Pins 17 and 18)
COMP1 and FB1 are the available external pins of the PWM
error amplifier. The FB1 pin is the inverting input of the error
amplifier. Similarly, the COMP1 pin is the error amplifier output.
These pins are used to compensate the voltage-control
feedback loop of the PWM converter.
GND (Pin 14)
Signal ground for the IC. All voltage levels are measured with
respect to this pin.
PGOOD (Pin 7)
PGOOD is an open collector output used to indicate the status
of the output voltages. This pin is pulled low when the core
output is not within 10%of the DACOUT reference voltage
and the other outputs are below their under-voltage thresholds.
The PGOOD output is open for ‘11111’ VID code. See Table 1.
PHASE1 (Pin 23)
Connect the PHASE pin to the PWM converter’s upper
MOSFET source. This pin is used to monitor the voltage drop
across the upper MOSFET for over-current protection.
FN4586 Rev 3.00
April 1, 2005
UGATE1 (Pin 24)
Connect UGATE pin to the PWM converter’s upper MOSFET
gate. This pin provides the gate drive for the upper MOSFET.
PGND (Pin 21)
This is the power ground connection. Tie the PWM converter’s
lower MOSFET source to this pin.
LGATE1 (Pin 22)
Connect LGATE1 to the PWM converter’s lower MOSFET
gate. This pin provides the gate drive for the lower MOSFET.
VCC (Pin 1)
Provide a 12V bias supply for the IC to this pin. This pin also
provides the gate bias charge for all the MOSFETs controlled
by the IC.
RT (Pin 10)
This pin provides oscillator switching frequency adjustment. By
placing a resistor (RT) from this pin to GND, the nominal
200kHz switching frequency is increased according to the
following equation:
Fs 200kHz + R-5----T------1k---0----6--
(RT to GND)
Conversely, connecting a pull-up resistor (RT) from this pin to
VCC reduces the switching frequency according to the
following equation:
F
s
200
k
H
z
–
-4----------1---0----7--
RTk
(RT to 12V)
FAULT (Pin 8)
This pin is low during normal operation, but it is pulled to VCC in
the event of an over-voltage or over-current condition.
DRIVE3 (Pin 15)
Connect this pin to the gate of an external MOSFET. This pin
provides the drive for the linear controller’s pass transistor.
FB3 (Pin 16)
Connect this pin to a resistor divider to set the linear controller
output voltage.
VOUT2 (Pin 13)
Output of the linear regulator. Supplies current up to 230mA.
FB2 (Pin 11)
Connect this pin to a resistor divider to set the linear regulator
output voltage.
VIN2 (Pin 12)
This pin supplies power to the internal regulator. Connect this
pin to a suitable 3.3V source.
Additionally, this pin is used to monitor the 3.3V supply. If,
following a startup cycle, the voltage drops below 2.55V
(typically), the chip shuts down. A new soft-start cycle is
initiated upon return of the 3.3V supply above the under-
voltage threshold.
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