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PDF HIP6013 Data sheet ( Hoja de datos )
| Número de pieza | HIP6013 | |
| Descripción | Buck Pulse-Width Modulator (PWM) Controller | |
| Fabricantes | Intersil Corporation | |
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Data Sheet
HIP6013
June 1997
File Number 4325
Buck Pulse-Width Modulator (PWM)
Controller
The HIP6013 provides complete control and protection for a
DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive an
N-Channel MOSFET in a standard buck topology. The
HIP6013 integrates all of the control, output adjustment,
monitoring and protection functions into a single package.
The output voltage of the converter can be precisely
regulated to as low as 1.27V, with a maximum tolerance of
±1.5% over temperature and line voltage variations.
The HIP6013 provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a
200kHz free-running triangle-wave oscillator that is
adjustable from below 50kHz to over 1MHz. The error
amplifier features a 15MHz gain-bandwidth product and
6V/µs slew rate which enables high converter bandwidth for
fast transient performance. The resulting PWM duty ratio
ranges from 0% to 100%.
The HIP6013 protects against over-current conditions by
inhibiting PWM operation. The HIP6013 monitors the current
by using the rDS(ON) of the upper MOSFET which eliminates
the need for a current sensing resistor.
Ordering Information
TEMP. RANGE
PART NUMBER
(oC)
PACKAGE
HIP6013CB
0 to 70 14 Ld SOIC
PKG.
NO.
M14.15
Pinout
HIP6013
(SOIC)
TOP VIEW
RT 1
OCSET 2
SS 3
COMP 4
FB 5
EN 6
GND 7
14 VCC
13 NC
12 NC
11 NC
10 BOOT
9 UGATE
8 PHASE
Features
• Drives N-Channel MOSFET
• Operates From +5V or +12V Input
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
- 1.27V Internal Reference
- ±1.5% Over Line Voltage and Temperature
• Over-Current Fault Monitor
- Does Not Require Extra Current Sensing Element
- Uses MOSFET’s rDS(on)
• Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator Programmable from
50kHz to Over 1MHz
• 14 Pin, SOIC Package
Applications
• Power Supply for Pentium®, Pentium Pro, PowerPC™ and
Alpha™ Microprocessors
• High-Power 5V to 3.xV DC-DC Regulators
• Low-Voltage Distributed Power Supplies
2-162
PowerPC™ is a trademark of IBM.
Alpha™ is a trademark of Digital Equipment Corporation.
Pentium® is a registered trademark of Intel Corporation.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
1 page  
HIP6013
Functional Description
Initialization
The HIP6013 automatically initializes upon receipt of power.
Special sequencing of the input supplies is not necessary.
The Power-On Reset (POR) function continually monitors
the input supply voltages and the enable (EN) pin. The POR
monitors the bias voltage at the VCC pin and the input
voltage (VIN) on the OCSET pin. The level on OCSET is
equal to VIN less a fixed voltage drop (see over-current
protection). With the EN pin held to VCC, the POR function
initiates soft start operation after both input supply voltages
exceed their POR thresholds. For operation with a single
+12V power source, VIN and VCC are equivalent and the
+12V power source must exceed the rising VCC threshold
before POR initiates operation.
The Power-On Reset (POR) function inhibits operation with
the chip disabled (EN pin low). With both input supplies
above their POR thresholds, transitioning the EN pin high
initiates a soft start interval.
Soft Start
The POR function initiates the soft start sequence. An
internal 10µA current source charges an external capacitor
(CSS) on the SS pin to 4V. Soft start clamps the error
amplifier output (COMP pin) and reference input (+ terminal
of error amp) to the SS pin voltage. Figure 3 shows the soft
start interval with CSS = 0.1µF. Initially the clamp on the
error amplifier (COMP pin) controls the converter’s output
voltage. At t1 in Figure 3, the SS voltage reaches the valley
of the oscillator’s triangle wave. The oscillator’s triangular
waveform is compared to the ramping error amplifier voltage.
This generates PHASE pulses of increasing width that
charge the output capacitor(s). This interval of increasing
pulse width continues to t2. With sufficient output voltage,
the clamp on the reference input controls the output voltage.
This is the interval between t2 and t3 in Figure 3. At t3 the
SS voltage exceeds the reference voltage and the output
voltage is in regulation. This method provides a rapid and
controlled output voltage rise.
SOFT-START
(1V/DIV)
OUTPUT
VOLTAGE
0V (1V/DIV)
0V
t1 t2
t3
TIME (5ms/DIV)
FIGURE 3. SOFT-START INTERVAL
Over-Current Protection
The over-current function protects the converter from a
shorted output by using the upper MOSFET’s on-resistance,
rDS(ON) to monitor the current. This method enhances the
converter’s efficiency and reduces cost by eliminating a
current sensing resistor.
The over-current function cycles the soft-start function in a
hiccup mode to provide fault protection. A resistor (ROCSET)
programs the over-current trip level. An internal 200µA
(typical) current sink develops a voltage across ROCSET that
is reference to VIN. When the voltage across the upper
MOSFET (also referenced to VIN) exceeds the voltage
across ROCSET, the over-current function initiates a soft-
start sequence. The soft-start function discharges CSS with
a 10µA current sink and inhibits PWM operation. The soft-
start function recharges CSS, and PWM operation resumes
with the error amplifier clamped to the SS voltage. Should an
overload occur while recharging CSS, the soft start function
inhibits PWM operation while fully charging CSS to 4V to
complete its cycle. Figure 4 shows this operation with an
overload condition. Note that the inductor current increases
to over 15A during the CSS charging interval and causes an
over-current trip. The converter dissipates very little power
with this method. The measured input power for the
conditions of Figure 4 is 2.5W.
2-166
5 Page 
HIP6013
HIP6013 DC-DC Converter Application Circuit
The figure below shows a DC-DC converter circuit for a
microprocessor application, originally designed to employ the
HIP6007 controller. Given the similarities between the
HIP6007 and HIP6013 controllers, the circuit can be
implemented using the HIP6013 controller without any
modifications. However, given the expanded reference voltage
tolerance range, the HIP6013-based converter may require
additional output capacitance. Detailed information on the
circuit, including a complete Bill-of-Materials and circuit board
description, can be found in application note AN9722. See
Intersil’s home page on the web: http://www.intersil.com or
Intersil AnswerFAX (407-724-7800) document # 99722.
12VCC
VIN
RTN
C1-5
3x 680µF
C17-18
2x 1µF
1206
ENABLE
C13
0.1µF
C12
R7
10K
1µF
1206
6
SS 3
RT 1
VCC
14
MONITOR AND
PROTECTION
R1
SPARE
OSC
U1
REF HIP6013
C19
1000pF
2 OCSET R6
3.01K
10 BOOT
Q1
9 UGATE
8 PHASE
13 NC
FB 5
+
-
-
+
4
12 NC
11 NC
7
R2
1K
C14 COMP GND
JP1
33pF
C15 R5
0.01µF 15K
C16
COMP
TP1
R3 SPARE
1K
R4
SPARE
CR1
4148
PHASE
TP2
C20
0.1µF
L2
CR3
C6-11
4x 1000µF
VOUT
RTN
Component Selection Notes:
C1-C3 - 3 each 680µF 25W VDC, Sanyo MV-GX or equivalent.
C6-C9 - 4 each 1000µF 6.3W VDC, Sanyo MV-GX or equivalent.
L1 - Core: Micrometals T60-52; Winding: 14 Turns of 17AWG.
CR1 - 1N4148 or equivalent.
CR3 - 15A, 35V Schottky, Motorola MBR1535CT or equivalent.
Q1 - Intersil MOSFET; RFP25N05.
FIGURE 11. DC-DC CONVERTER APPLICATION CIRCUIT
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site http://www.intersil.com
2-172
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet HIP6013.PDF ] | |
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