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參數資料
| 型號： | HIP6004CB |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor |
| 中文描述： | SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO20 |
| 文件頁數： | 7/12頁 |
| 文件大?。?/td> | 211K |
| 代理商： | HIP6004CB |
7
Application Guidelines
Layout Considerations
As in any high frequency switching converter, layout is very
important. Switching current from one power device to another
can generate voltage transients across the impedances of the
interconnecting bond wires and circuit traces. These
interconnecting impedances should be minimized by using
wide, short printed circuit traces. The critical components
should be located as close together as possible, using ground
plane construction or single point grounding.
Figure 6 shows the critical power components of the
converter. To minimize the voltage overshoot the
interconnecting wires indicated by heavy lines should be
part of ground or power plane in a printed circuit board. The
components shown in Figure 6 should be located as close
together as possible. Please note that the capacitors C
IN
and C
O
each represent numerous physical capacitors.
Locate the HIP6004 within 3 inches of the MOSFETs, Q1
and Q2. The circuit traces for the MOSFETs’ gate and
source connections from the HIP6004 must be sized to
handle up to 1A peak current.
Figure 7 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 VCC and
GND pins. Locate the capacitor, C
BOOT
as close as practical
to the BOOT and PHASE pins.
Feedback Compensation
Figure 8 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
).
1.26V
VID3
VID2
VID1
VID0
COMP
DACOUT
ERROR
AMPLIFIER
2.7k
1.7k
5.4k
10.7k
21.5k
2.9k
DAC
VID4
3.6k
12k
12k
BAND GAP
REFERENCE
+
-
FB
+
-
FIGURE 5. DAC FUNCTION SCHEMATIC
PGND
L
O
C
O
LGATE
UGATE
PHASE
Q1
Q2
D2
V
IN
V
OUT
RETURN
HIP6004
C
IN
L
FIGURE 6. PRINTED CIRCUIT BOARD POWER AND
GROUND PLANES OR ISLANDS
FIGURE 7. PRINTED CIRCUIT BOARD SMALL SIGNAL
LAYOUT GUIDELINES
+12V
HIP6004
SS
GND
VCC
BOOT
D1
L
O
C
O
V
OUT
L
Q1
Q2
PHASE
+V
IN
C
BOOT
C
VCC
C
SS
FIGURE 8. VOLTAGE-MODE BUCK CONVERTER
COMPENSATION DESIGN
V
OUT
OSC
REFERENCE
L
O
C
O
ESR
V
IN
V
OSC
ERROR
AMP
PWM
DRIVER
(PARASITIC)
Z
FB
+
-
DACOUT
R1
R3
R2
C3
C2
C1
COMP
V
OUT
FB
Z
FB
HIP6004
Z
IN
COMPARATOR
DRIVER
DETAILED COMPENSATION COMPONENTS
PHASE
V
E/A
+
-
+
-
Z
IN
HIP6004
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相關代理商/技術參數 |
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|---|---|
| HIP6004CB WAF | 制造商:Harris Corporation 功能描述: |
| HIP6004CBR4543 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HIP6004CB-T | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HIP6004CBTS | 制造商:HARRIS 功能描述:* |
| HIP6004D | 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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