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参数资料
| 型号： | HIP6301CB-T |
| 厂商： | Intersil |
| 文件页数： | 10/17页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 20-SOIC |
| 标准包装： | 1 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 336kHz |
| 占空比： | 75% |
| 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： | 标准包装 |
| 其它名称： | HIP6301CB-DKR HIP6301CB-DKR-ND HIP6301CBDKR |
HIP6301
Fault Protection
The HIP6301 protects the microprocessor and the entire
power system from damaging stress levels. Within the
HIP6301 both Overvoltage and Overcurrent circuits are
incorporated to protect the load and regulator.
Overvoltage
The VSEN pin is connected to the microprocessor CORE
voltage. A CORE overvoltage condition is detected when the
VSEN pin goes more than 15% above the programmed VID
level.
The overvoltage 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 overvoltage, 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
overvoltage limit (plus some hysteresis), the PWM outputs
will three state. The HIP6601B family drivers pass the three
state information along, and shuts off both upper and lower
MOSFETs. This prevents “dumping” of the output capacitors
back through the lower MOSFETs, avoiding a possibly
destructive ringing of the capacitors and output inductors. If
the conditions that caused the overvoltage still persist, the
PWM outputs will be cycled between three state and V CORE
clamped to ground, as a hysteretic shunt regulator.
Undervoltage
The VSEN pin also detects when the CORE voltage falls
more than 10% below the VID programmed level. This
causes PGOOD to go low, but has no other effect on
operation and is not latched. There is also hysteresis in this
detection point.
10
Overcurrent
In the event of an overcurrent condition, the overcurrent
protection circuit reduces the average current delivered to
less than 25% of the current limit. When an overcurrent
condition is detected, the controller forces all PWM outputs
into a three state mode. This condition results in the gate
driver removing drive to the output stages. The HIP6301
goes into a wait delay timing cycle that is equal to the Soft-
Start ramp time. PGOOD also goes “low” during this time
due to VSEN going below its threshold voltage. To lower the
average output dissipation, the Soft-Start initial wait time is
increased from 32 to 2048 cycles, then the Soft-Start ramp is
initiated. At a PWM frequency of 200kHz, for instance, an
overcurrent detection would cause a dead time of 10.24ms,
then a ramp of 10.08ms.
At the end of the delay, PWM outputs are restarted and the
soft-start ramp is initiated. If a short is present at that time,
the cycle is repeated. This is the hiccup mode.
Figure 6 shows the supply shorted under operation and the
hiccup operating mode described above. Note that due to
the high short circuit current, overcurrent is detected before
completion of the start-up sequence so the delay is not quite
as long as the normal Soft-Start cycle.
SHORT APPLIED HERE
PGOOD
SHORT
CURRENT
50A/Div
HICCUP MODE. SUPPLY POWERED BY ATX SUPPLY
CORE LOAD CURRENT = 31A, 5V LOAD = 5A
SUPPLY FREQUENCY = 200kHz, V IN = 12V
ATX SUPPLY ACTIVATED BY ATX “PS-ON PIN”
FIGURE 6. SHORT APPLIED TO SUPPLY AFTER POWER-UP
FN4765.6
December 27, 2004
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| HIP6301CB-TS2568 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HIP6301CBZ | 功能描述:电流型 PWM 控制器 FLEXIBLE 2-4 PHS SYNCH BUCK CNTRLR 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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| HIP6301EVAL1 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
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