参数资料
| 型号： | HIP6004ECVZ-T |
| 厂商： | Intersil |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM VOLTAGE MON 20TSSOP |
| 标准包装： | 2,500 |
| 应用： | 控制器，Intel VRM8.5 |
| 输入电压： | 5V，12V |
| 输出数： | 1 |
| 输出电压： | 1.05 V ~ 1.825 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | * |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | * |
| 包装： | 带卷 (TR) |
HIP6004E
OSC
DRIVER
V IN
Compensation Break Frequency Equations
-
F Z1 = ------------------------------------
F P1 = ---------------------------------------------------------
2 π x R 2 x ? ---------------------- ?
? V OSC
PWM
COMPARATOR
+
DRIVER
L O
PHASE
C O
V OUT
1
2 π x R 2 x C 1
1
? C 1 x C 2 ?
? C 1 + C 2 ?
F Z2 = -------------------------------------------------------
F P2 = ------------------------------------
Z FB
ESR
(PARASITIC)
1
2 π x ( R 1 + R 3 ) x C 3
1
2 π x R 3 x C 3
V E/A
Figure 8 shows an asymptotic plot of the DC-DC converter’s
-
+
ERROR
AMP
Z IN
REFERENCE
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
DETAILED COMPENSATION COMPONENTS
Compensation Gain similar to the curve plotted. The open
loop error amplifier gain bounds the compensation gain.
C 1
C 2
R 2
Z FB
C 3
Z IN
R 3
V OUT
Check the compensation gain at F P2 with the capabilities of
the error amplifier. The Closed Loop Gain is constructed on
the log-log graph of Figure 8 by adding the Modulator Gain (in
dB) to the Compensation Gain (in dB). This is equivalent to
COMP
HIP6004E
-
+
DACOUT
FB
R 1
multiplying the modulator transfer function to the
compensation transfer function and plotting the gain.
The compensation gain uses external impedance networks
Z FB and Z IN 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
FIGURE 7. VOLTAGE-MODE BUCK CONVERTER
COMPENSATION DESIGN
degrees. Include worst case component variations when
determining phase margin.
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 .
100
80
60
40
20
20LOG
(R 2 /R 1 )
F Z1 F Z2
F P1
F P2
OPEN LOOP
ERROR AMP GAIN
20LOG
F LC = -------------------------------------------
F ESR = --------------------------------------------
MODULATOR
GAIN
F LC
Modulator Break Frequency Equations
1 1
2 π x LO x CO 2 π x ESR x C O
The compensation network consists of the error amplifier
(internal to the HIP6004E) 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:
(V IN / ? V OSC )
0
COMPENSATION
-20 GAIN
CLOSED LOOP
-40 GAIN
F ESR
-60
10 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
FIGURE 8. ASYMPTOTIC BODE PLOT OF CONVERTER GAIN
Component Selection Guidelines
Output Capacitor Selection
An output capacitor is required to filter the output and supply
the load transient current. The filtering requirements are a
function of the switching frequency and the ripple current.
1.
2.
3.
4.
5.
6.
7.
Pick Gain (R 2 /R 1 ) for desired converter bandwidth.
Place 1 ST Zero Below Filter’s Double Pole (~75% F LC ).
Place 2 ND Zero at Filter’s Double Pole.
Place 1 ST Pole at the ESR Zero.
Place 2 ND Pole at Half the Switching Frequency.
Check Gain against Error Amplifier’s Open-Loop Gain.
Estimate Phase Margin - Repeat if Necessary.
The load transient requirements are a function of the slew
rate (di/dt) and the magnitude of the transient load current.
These requirements are generally met with a mix of
capacitors and careful layout.
Modern microprocessors produce transient load rates above
1A/ns. High frequency capacitors initially supply the transient
and slow the current load rate seen by the bulk capacitors.
8
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相关代理商/技术参数 |
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|---|---|
| HIP6004EVAL1 | 功能描述:EVALUATION BOARD HIP6004 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| HIP6004EVAL3 | 功能描述:电源管理IC开发工具 EMBEDDED EVAL BRD SYNC BUCK/KLAM RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| HIP6005 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor |
| HIP6005A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor |
| HIP6005ACB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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