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参数资料
| 型号： | HIP6303CB |
| 厂商： | Intersil |
| 文件页数： | 13/17页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 20-SOIC |
| 标准包装： | 38 |
| PWM 型： | 控制器 |
| 输出数： | 4 |
| 频率 - 最大： | 350kHz |
| 电源电压： | 4.75 V ~ 5.25 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 管件 |
HIP6303
The inductor, or load current, ?ows alternately from V IN
through Q1 and from ground through Q2. The HIP6303
samples the on-state voltage drop across each Q2 transistor
to indicate the inductor current in that channel. The voltage
drop is sampled 1/3 of a switching period, 1/F SW , after Q1 is
turned OFF and Q2 is turned on. Because of the sawtooth
current component, the sampled current is different from the
average current per channel. Neglecting secondary effects,
the sampled current (I SAMPLE ) can be related to the load
current (I LT ) by:
I SAMPLE = I LT / n + (V IN V CORE - 3V CORE2 ) / (6L x F SW x V IN )
1,000
500
200
100
50
20
Where: I LT
= total load current
n = the number of channels
10
Example: Using the previously given conditions, and
5
For I LT
= 100A,
n =4
Then I SAMPLE = 25.49A.
2
1
As discussed previously, the voltage drop across each Q2
transistor at the point in time when current is sampled is
r DSON (Q2) x I SAMPLE . The voltage at Q2’s drain, the
10
20 50 100 200 500 1,000 2,000 5,000 10,000
CHANNEL OSCILLATOR FREQUENCY, F SW (kHz)
FIGURE 10. RESISTANCE R T vs FREQUENCY
PHASE node, is applied through the R ISEN resistor to the
HIP6303 ISEN pin. This pin is held at virtual ground, so the
current into ISEN is:
I SENSE = I SAMPLE x r DS(ON) (Q2) / R ISEN .
Layout Considerations
MOSFETs switch very fast and ef?ciently. The speed with
which the current transitions from one device to another
causes voltage spikes across the interconnecting
R Isen
= I SAMPLE x r DS(ON) (Q2) / 50 μ A
impedances and parasitic circuit elements. These voltage
spikes can degrade ef?ciency, radiate noise into the circuit
Example: From the previous conditions,
and lead to device over-voltage stress. Careful component
where I LT
I SAMPLE
r DS(ON) (Q2)
Then: R ISEN
I CURRENT TRIP
Short circuit I LT
= 100A,
= 25.49A,
= 4m ?
= 2.04K and
= 165%
= 165A.
layout and printed circuit design minimizes the voltage
spikes in the converter. Consider, as an example, the turnoff
transition of the upper PWM MOSFET. Prior to turnoff, the
upper MOSFET was carrying channel current. During the
turnoff, current stops ?owing in the upper MOSFET and is
picked up by the lower MOSFET. Any inductance in the
switched current path generates a large voltage spike during
the switching interval. Careful component selection, tight
layout of the critical components, and short, wide circuit
Channel Frequency Oscillator
The channel oscillator frequency is set by placing a resistor,
R T , to ground from the FS/DIS pin. Figure 10 is a curve
showing the relationship between frequency, F SW, and
resistor R T . To avoid pickup by the FS/DIS pin, it is important
to place this resistor next to the pin. If this pin is also used to
disable the converter, it is also important to locate the pull-
down device next to this pin.
traces minimize the magnitude of voltage spikes. Contact
Intersil for evaluation board drawings of the component
placement and printed circuit board.
There are two sets of critical components in a DC-DC
converter using a HIP6303 controller and a HIP6601 gate
driver. The power components are the most critical because
they switch large amounts of energy. Next are small signal
components that connect to sensitive nodes or supply
critical bypassing current and signal coupling.
The power components should be placed ?rst. Locate the
input capacitors close to the power switches. Minimize the
length of the connections between the input capacitors, C IN ,
and the power switches. Locate the output inductors and
output capacitors between the MOSFETs and the load.
Locate the gate driver close to the MOSFETs.
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HIP6303CB WAF | 制造商:Harris Corporation 功能描述: |
| HIP6303CB-T | 功能描述:IC REG CTRLR BUCK PWM 20-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| HIP6303EVAL1 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6304 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6304 WAF | 制造商:Intersil Corporation 功能描述: |
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