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参数资料
| 型号： | HIP6311CB |
| 厂商： | Intersil |
| 文件页数： | 9/17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： | 305kHz |
| 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 |
HIP6311
Figure 3 shows the start-up sequence as initiated by a fast
rising 5V supply, V CC, applied to the HIP6311. Note the short
rise to the three state level in PWM 1 output during first 32
PWM cycles.
12V ATX
SUPPLY
PGOOD
PWM 1
OUTPUT
V CORE
DELAY TIME
PGOOD
5 V ATX
SUPPLY
V CORE
5V
V CC
V IN = 12V
FIGURE 3. START-UP OF 4 PHASE SYSTEM OPERATING AT
500kHz
Figure 4 shows the waveforms when the regulator is
operating at 200kHz. Note that the Soft-Start duration is a
function of the Channel Frequency as explained previously.
Also note the pulses on the COMP terminal. These pulses
are the current correction signal feeding into the comparator
input (see the Block Diagram on page 2.)
V COMP
DELAY TIME
PGOOD
V CORE
5V
V CC
V IN = 12V
FIGURE 4. START-UP OF 4 PHASE SYSTEM OPERATING AT
200kHz
Figure 5 shows the regulator operating from an ATX supply.
In this figure, note the slight rise in PGOOD as the 5V supply
rises.The PGOOD output stage is made up of NMOS and
PMOS transistors. On the rising V CC , the PMOS device
becomes active slightly before the NMOS transistor pulls
“down”, generating the slight rise in the PGOOD voltage.
9
V IN = 5V, CORE LOAD CURRENT = 31A
FREQUENCY 200kHz
ATX SUPPLY ACTIVATED BY ATX “PS-ON PIN”
FIGURE 5. SUPPLY POWERED BY ATX SUPPLY
Note that Figure 5 shows the 12V gate driver voltage
available before the 5V supply to the HIP6311 has reached
its threshold level. If conditions were reversed and the 5V
supply was to rise first, the start-up sequence would be
different. In this case the HIP6303 will sense an over-current
condition due to charging the output capacitors. The supply
will then restart and go through the normal Soft-Start cycle.
Fault Protection
The HIP6311 protects the microprocessor and the entire
power system from damaging stress levels. Within the
HIP6311 both Over-Voltage and Over-Current circuits are
incorporated to protect the load and regulator.
Over-Voltage
The VSEN pin is connected to the microprocessor CORE
voltage. A CORE over-voltage condition is detected when
the VSEN pin goes more than 15% above the programmed
VID level.
The over-voltage condition is latched, disabling normal PWM
operation, and causing PGOOD to go low. The latch can
only be reset by lowering and returning V CC high to initiate a
POR and Soft-Start sequence.
During a latched over-voltage, the PWM outputs will be
driven either low or three state, depending upon the VSEN
input. PWM outputs are driven low when the VSEN pin
detects that the CORE voltage is 15% above the
programmed VID level. This condition drives the PWM
outputs low, resulting in the lower or synchronous rectifier
MOSFETS to conduct and shunt the CORE voltage to
ground to protect the load.
If after this event, the CORE voltage falls below the over-
voltage limit (plus some hysteresis), the PWM outputs will
three state. The HIP6601 family drivers pass the three state
information along, and shuts off both upper and lower
MOSFETs. This prevents “dumping” of the output capacitors
FN4817.3
December 27, 2004
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相关代理商/技术参数 |
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|---|---|
| HIP6311CB-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) |
| HIP6311CBZ | 功能描述:电流型 PWM 控制器 2-4 PHS SYNCH BUCK CNTRLR 0 8%F RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| HIP6311CBZA | 功能描述:电流型 PWM 控制器 W/ANL 2-4 PHS SYNCH BUCK CNTRLR 0 8%F RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| HIP6311CBZA-T | 功能描述:电流型 PWM 控制器 W/ANL 2-4 PHS SYNCH BUCK CNTRLR 0 8%F RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| HIP6311CBZ-T | 功能描述:电流型 PWM 控制器 2-4 PHS SYNCH BUCK CNTRLR 0 8%REF TAPE RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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