|
|
PDF HIP6020EVAL1 Data sheet ( Hoja de datos )
| Número de pieza | HIP6020EVAL1 | |
| Descripción | Advanced Dual PWM and Dual Linear Power Controller | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HIP6020EVAL1 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
Data Sheet
HIP6020
February 1999
File Number 4683
Advanced Dual PWM and Dual Linear
Power Controller
The HIP6020 provides the power control and protection for
four output voltages in high-performance, graphics intensive
microprocessor and computer applications. The IC
integrates two PWM controllers and two linear controllers, as
well as the monitoring and protection functions into a 28-pin
SOIC package. One PWM controller regulates the
microprocessor core voltage with a synchronous-rectified
buck converter. The second PWM controller supplies the
computer system’s AGP 1.5V or 3.3V bus power with a
standard buck converter. The linear controllers regulate
power for the 1.5V GTL bus and the 1.8V power for the
North/South Bridge core voltage and/or cache memory
circuits.
The HIP6020 includes an Intel-compatible, TTL 5-input
digital-to-analog converter (DAC) that adjusts the core PWM
output voltage from 1.3VDC to 2.05VDC in 0.05V steps and
from 2.1VDC to 3.5VDC in 0.1V increments. The precision
reference and voltage-mode control provide ±1% static
regulation. The second PWM controller’s output is user-
selectable, through a TTL-compatible signal applied at the
SELECT pin, for levels of 1.5V or 3.3V with ±3% accuracy.
The linear regulators use external N-Channel MOSFETs or
bipolar NPN pass transistors to provide fixed output voltages
of 1.5V ±3% (VOUT3) and 1.8V ±3% (VOUT4).
The HIP6020 monitors all the output voltages. A single
Power Good signal is issued when the core is within ±10% of
the DAC setting and all other outputs are above their under-
voltage levels. Additional built-in over-voltage protection for
the core output uses the lower MOSFET to prevent output
voltages above 115% of the DAC setting. The PWM
controllers’ over-current function monitors the output current
by using the voltage drop across the upper MOSFET’s
rDS(ON), eliminating the need for a current sensing resistor.
Ordering Information
TEMP.
PART NUMBER RANGE (oC)
PACKAGE
HIP6020CB
0 to 70 28 Ld SOIC
HIP6020EVAL1 Evaluation Board
PKG.
NO.
M28.3
Features
• Provides 4 Regulated Voltages
- Microprocessor Core, AGP Bus, North/South Bridge
and/or Cache Memory, and GTL Bus Power
• Drives N-Channel MOSFETs
• Linear Regulator Drives Compatible with both MOSFET
and Bipolar Series Pass Transistors
• Simple Single-Loop Control Designs
- Voltage-Mode PWM Control
• Fast PWM Converter Transient Response
- High-Bandwidth Error Amplifiers
- Full 0% to 100% Duty Ratios
• Excellent Output Voltage Regulation
- Core PWM Output: ±1% Over Temperature
- AGP Bus PWM Output: ±3% Over Temperature
- Other Outputs: ±3% Over Temperature
• TTL-Compatible 5 Bit DAC Microprocessor Core Output
Voltage Selection
- Wide Range . . . . . . . . . . . . . . . . . . . 1.3VDC to 3.5VDC
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
- Switching Regulators Do Not Require Extra Current
Sensing Elements, Use MOSFET’s rDS(ON)
• Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator; Programmable From
50kHz to Over 1MHz
- Small External Component Count
Applications
• Motherboard Power Regulation for Computers
Pinout
HIP6020 (SOIC)
TOP VIEW
UGATE2 1
PHASE2 2
VID4 3
VID3 4
VID2 5
VID1 6
VID0 7
PGOOD 8
OCSET2 9
VSEN2 10
SELECT 11
SS 12
FAULT/RT 13
VSEN4 14
28 VCC
27 UGATE1
26 PHASE1
25 LGATE1
24 PGND
23 OCSET1
22 VSEN1
21 FB1
20 COMP1
19 VSEN3
18 DRIVE3
17 GND
16 VAUX
15 DRIVE4
2-281
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  
HIP6020
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
PWM CONTROLLERS GATE DRIVERS
UGATE1,2 Source
UGATE1,2 Sink
LGATE Source
LGATE Sink
PROTECTION
IUGATE
RUGATE
ILGATE
RLGATE
VCC = 12V, VUGATE1 (or VUGATE2) = 6V
VGATE-PHASE = 1V
VCC = 12V, VLGATE1 = 1V
VLGATE = 1V
-1-
- 1.7 3.5
-1-
- 1.4 3.0
A
Ω
A
Ω
VSEN1 Over-Voltage (VSEN1/DACOUT)
VSEN1 Rising
- 115 120
%
FAULT Sourcing Current
OCSET1,2 Current Source
Soft-Start Current
POWER GOOD
IOVP
IOCSET
ISS
VFAULT/RT = 2.0V
VOCSET = 4.5VDC
- 8.5 -
170 200 230
- 28 -
mA
µA
µA
VSEN1 Upper Threshold
(VSEN1/DACOUT)
VSEN1 Rising
108 - 110
%
VSEN1 Under-Voltage
(VSEN1/DACOUT)
VSEN1 Rising
92 - 94
%
VSEN1 Hysteresis (VSEN1/DACOUT)
Upper/Lower Threshold
-2-
%
PGOOD Voltage Low
VPGOOD IPGOOD = -4mA
- - 0.8 V
Typical Performance Curves
1000
100
RT PULLUP
TO +12V
10
RT PULLDOWN TO VSS
10 100
SWITCHING FREQUENCY (kHz)
1000
FIGURE 1. RT RESISTANCE vs FREQUENCY
Functional Pin Descriptions
VCC (Pin 28)
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. The voltage at this pin is monitored for
Power-On Reset (POR) purposes.
GND (Pin 17)
Signal ground for the IC. All voltage levels are measured with
respect to this pin.
140
CUGATE1 = CUGATE2 = CLGATE1 = C
120 VIN = 5V
VCC = 12V
100
C = 4800pF
80
C = 3600pF
60
C = 1500pF
40
20 C = 660pF
0
100 200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
PGND (Pin 24)
This is the power ground connection. Tie the synchronous
PWM converter’s lower MOSFET source to this pin.
VAUX (Pin 16)
The +3.3V input voltage at this pin is monitored for power-on
reset (POR) purposes. Connected to +5V input, this pin
provides boost current for the two linear regulator output
drives in the event bipolar NPN transistors (instead of
N-channel MOSFETs) are employed as pass elements.
2-285
5 Page 
HIP6020
∆VOSC
OSC
PWM
COMP
-
+
VIN
DRIVER
LO VOUT
DRIVER
PHASE
CO
VE/A
ZFB
-
+
ERROR
AMP
ZIN
REFERENCE
ESR
(PARASITIC)
DETAILED COMPENSATION COMPONENTS
C2
C1 R2
ZFB VOUT
ZIN
C3 R3
COMP
FB
-
+
HIP6020
DACOUT
R1
FIGURE 8. VOLTAGE-MODE BUCK CONVERTER
COMPENSATION DESIGN
The modulator transfer function is the small-signal transfer
function of VOUT/VE/A. This function is dominated by a DC
Gain, given by VIN/VOSC, and shaped by the output filter, with
a double pole break frequency at FLC and a zero at FESR.
Modulator Break Frequency Equations
FLC=
-------------------1--------------------
2π × LO × CO
FESR= 2----π-----×-----E----S--1---R------×-----C----O---
The compensation network consists of the error amplifier
(internal to the HIP6020) and the impedance networks ZIN and
ZFB. The goal of the compensation network is to provide a
closed loop transfer function with high 0dB crossing frequency
(f0dB) and adequate phase margin. Phase margin is the
difference between the closed loop phase at f0dB and 180
degrees. The equations below relate the compensation
network’s poles, zeros and gain to the components (R1, R2,
R3, C1, C2, and C3) in Figure 11. Use these guidelines for
locating the poles and zeros of the compensation network:
1. Pick Gain (R2/R1) for desired converter bandwidth
2. Place 1ST Zero Below Filter’s Double Pole (~75% FLC)
3. Place 2ND Zero at Filter’s Double Pole
4. Place 1ST Pole at the ESR Zero
5. Place 2ND Pole at Half the Switching Frequency
6. Check Gain against Error Amplifier’s Open-Loop Gain
7. Estimate Phase Margin - Repeat if Necessary
Compensation Break Frequency Equations
FZ1 = -2---π-----×-----R---1--2-----×----C-----1--
FP1
=
---------------------------1---------------------------
2π
×
R2
×
C-C----11-----+×-----CC-----22--
FZ2 = -2---π-----×-----(--R-----1-----+-1----R-----3----)---×-----C-----3-
FP2 = -2---π-----×-----R---1--3-----×----C-----3--
Figure 12 shows an asymptotic plot of the DC-DC converter’s
gain vs. frequency. The actual Modulator Gain has a high gain
peak dependent on the quality factor (Q) of the output filter,
which is not shown in Figure 12. Using the above guidelines
should yield a Compensation Gain similar to the curve plotted.
The open loop error amplifier gain bounds the compensation
gain. Check the compensation gain at FP2 with the capabilities
of the error amplifier. The Closed Loop Gain is constructed on
the log-log graph of Figure 12 by adding the Modulator Gain (in
dB) to the Compensation Gain (in dB). This is equivalent to
multiplying the modulator transfer function to the compensation
transfer function and plotting the gain.
100
FZ1
FZ2 FP1 FP2
OPEN LOOP
ERROR AMP GAIN
80
20
log
V----V-P---I--–-N----P--
60
40 COMPENSATION
GAIN
20
0
-20
20
log
RR-----21--
MODULATOR
-40
GAIN
FLC FESR
CLOSED LOOP
GAIN
-60
10 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
FIGURE 9. ASYMPTOTIC BODE PLOT OF CONVERTER GAIN
The compensation gain uses external impedance networks
ZFB and ZIN to provide a stable, high bandwidth (BW) overall
loop. A stable control loop has a gain crossing with
-20dB/decade slope and a phase margin greater than
45 degrees. Include worst case component variations when
determining phase margin.
PWM2 Controller Feedback Compensation
To reduce the number of external small-signal components
required by a typical application, the standard PWM
controller is internally stabilized. The only stability criteria
that needs to be met relates the minimum value of the output
inductor to the equivalent ESR of the output capacitor bank,
as shown in the following equation:
LOUT(MIN) = -E----S----R-2----O-×----U-π---T--×--×---B--1--W--0---1---.--7---5-
2-291
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HIP6020EVAL1.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HIP6020EVAL1 | Advanced Dual PWM and Dual Linear Power Controller | Intersil Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |