參數(shù)資料
型號(hào)： HIP6004A
廠商： Intersil Corporation
英文描述： Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor(脈沖帶寬調(diào)節(jié)控制和輸出電壓檢測(cè)電路)
中文描述： 降壓脈寬調(diào)制（PWM）控制器和輸出電壓監(jiān)視器（脈沖帶寬調(diào)節(jié)控制和輸出電壓檢測(cè)電路）
文件頁(yè)數(shù)： 8/12頁(yè)
文件大?。?/td> 159K
代理商： HIP6004A
2-69
together as possible. Please note that the capacitors C
IN
and C
O
each represent numerous physical capacitors.
Locate the HIP6004A within 3 inches of the MOSFETs, Q
1
and Q
2
. The circuit traces for the MOSFETs’ gate and
source connections from the HIP6004A must be sized to
handle up to 1A peak current.
Figure 6 shows the circuit traces that require additional
layout consideration. Use single point and ground plane
construction for the circuits shown. Minimize any leakage
current paths on the SS PIN and locate the capacitor, C
ss
close to the SS pin because the internal current source is
only 10
μ
A. Provide local V
CC
decoupling between V
CC
and
GND pins. Locate the capacitor, C
BOOT
as close as practical
to the BOOT and PHASE pins.
Feedback Compensation
Figure 7 highlights the voltage-mode control loop for a
synchronous-rectified buck converter. The output voltage
(V
OUT
) is regulated to the Reference voltage level. The error
amplifier (Error Amp) output (V
E/A
) is compared with the
oscillator (OSC) triangular wave to provide a pulse-width
modulated (PWM) wave with an amplitude of V
IN
at the
PHASE node. The PWM wave is smoothed by the output
filter (L
O
and C
O
).
The modulator transfer function is the small-signal transfer
function of V
OUT
/V
E/A
. This function is dominated by a DC
Gain and the output filter (L
O
and C
O
), with a double pole
break frequency at F
LC
and a zero at F
ESR
. The DC Gain of
the modulator is simply the input voltage (V
IN
) divided by the
peak-to-peak oscillator voltage
V
OSC
.
Modulator Break Frequency Equations
The compensation network consists of the error amplifier
(internal to the HIP6004A) and the impedance networks Z
IN
and Z
FB
. The goal of the compensation network is to provide
a closed loop transfer function with the highest 0dB crossing
frequency (f
0dB
) and adequate phase margin. Phase margin
is the difference between the closed loop phase at f
0dB
and
180 degrees
.
The equations below relate the compensation
network’s poles, zeros and gain to the components (R
1
, R
2
,
R
3
, C
1
, C
2
, and C
3
) in Figure 7. Use these guidelines for
locating the poles and zeros of the compensation network:
1. Pick Gain (R
2
/R
1
) for desired converter bandwidth
2. Place 1
ST
Zero Below Filter’s Double Pole (~75% F
LC
)
3. Place 2
ND
Zero at Filter’s Double Pole
4. Place 1
ST
Pole at the ESR Zero
5. Place 2
ND
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
Figure 8 shows an asymptotic plot of the DC-DC
converter’s gain vs. frequency. The actual Modulator Gain
has a high gain peak due to the high Q factor of the output
filter and is not shown in Figure 8. Using the above
guidelines should give a Compensation Gain similar to the
curve plotted. The open loop error amplifier gain bounds
the compensation gain. Check the compensation gain at
FIGURE 6. PRINTED CIRCUIT BOARD SMALL SIGNAL
LAYOUT GUIDELINES
+12V
HIP6004A
SS
GND
V
CC
BOOT
D
1
L
O
C
O
V
OUT
L
Q
1
Q
2
PHASE
+V
IN
C
BOOT
C
VCC
C
SS
F
LC
L
O
2
π
C
O
--------------------------------------
=
F
ESR
O
---------------------------------------
=
FIGURE 7. VOLTAGE-MODE BUCK CONVERTER COMPEN-
SATION DESIGN
V
OUT
OSC
REFERENCE
L
O
C
O
ESR
V
IN
V
OSC
ERROR
AMP
PWM
DRIVER
(PARASITIC)
Z
FB
+
-
DACOUT
R
1
R
3
R
2
C
3
C
2
C
1
COMP
V
OUT
FB
Z
FB
HIP6004A
Z
IN
COMPARATOR
DRIVER
DETAILED COMPENSATION COMPONENTS
PHASE
V
E/A
+
-
+
-
Z
IN
F
Z1
2
1
---------------------------------
=
F
Z2
1
R
3
)
C
3
-----------------------+
=
F
P1
2
π
R
2
1
2
C
2
+
--------------------
----------------------------------------------------
=
F
P2
3
3
---------------------------------
=
HIP6004A
相關(guān)PDF資料
PDF描述
HIP6004ACB Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor
HIP6004B Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor(脈沖帶寬調(diào)節(jié)控制和輸出電壓檢測(cè)電路)
HIP6004 Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor(脈沖帶寬調(diào)節(jié)控制和輸出電壓檢測(cè)電路)
HIP6004CB Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor
HIP6005A Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor(脈沖帶寬調(diào)節(jié)控制和輸出電壓檢測(cè)電路)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HIP6004A_02 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor
HIP6004ACB 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述:SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20 制造商:Intersil Corporation 功能描述:
HIP6004ACB-T 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Harris Corporation 功能描述:
HIP6004B 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor
HIP6004B_03 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor
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