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参数资料
| 型号： | ISL6263BEVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 12/18页 |
| 文件大小： | 0K |
| 描述： | EVAL BAORD 1 FOR ISL6263B |
| 标准包装： | 1 |
| 系列： | * |
ISL6263B
ISL6263B will latch UGATE and PGOOD low but unlike other
protective faults, LGATE remains high until the voltage
between VO and VSS falls below approximately 0.77V, at
which time LGATE is pulled low. The LGATE pin will continue
to switch high and low at 1.545V and 0.77V until VDD has
gone below the falling POR threshold voltage VVDD_THF.
This provides maximum protection against a shorted
PWM
high-side MOSFET while preventing the output voltage from
ringing below ground. The severe-overvoltage fault circuit
can be triggered after another fault has already been
LGATE
1V
latched.
TABLE 3. FAULT PROTECTION SUMMARY OF ISL6263B
FAULT
UGATE
1V
DURATION
PRIOR TO
PROTECTION
FAULT
t PDRU
t PDRL
FAULT TYPE
PROTECTION
ACTIONS
RESET
FIGURE 6. GATE DRIVER TIMING DIAGRAM
Overcurrent
Short Circuit
Overvoltage
(+195mV)
between VO pin
and SOFT pin
Severe
Overvoltage
(+1.55V)
between VO pin
and VSS pin
Undervoltage
(-300mV)
between VO pin
and SOFT pin
120μs
<2μs
1ms
Immediately
1ms
LGATE, UGATE, and Cycle
PGOOD latched low VR_ON or
VDD
LGATE, UGATE, and Cycle
PGOOD latched low VR_ON or
VDD
LGATE, UGATE, and Cycle
PGOOD latched low VR_ON or
VDD
UGATE, and Cycle
PGOOD latched low, VDD only
LGATE toggles ON
when VO>1.55V
OFF when
VO <0.77V
until fault reset
LGATE, UGATE, and Cycle
PGOOD latched low VR_ON or
VDD
Adaptive shoot-through protection prevents the gate-driver
outputs from going high until the opposite gate-driver output
has fallen below approximately 1V. The UGATE turn-on
propagation delay t PDRU and LGATE turn-on propagation
delay t PDRL are found in the “Electrical Specifications” table
on page 6. The power for the LGATE gate-driver is sourced
directly from the PVCC pin. The power for the UGATE
gate-driver is sourced from a boot-strap capacitor connected
across the BOOT and PHASE pins. The boot capacitor is
charged from PVCC through an internal boot-strap diode
each time the low-side MOSFET turns on, pulling the
PHASE pin low.
Internal Bootstrap Diode
The ISL6263B has an integrated boot-strap Schottky diode
connected from the PVCC pin to the BOOT pin. Simply
adding an external capacitor across the BOOT and PHASE
pins completes the bootstrap circuit.
2.0
1.8
Gate-Driver Outputs LGATE and UGATE
The ISL6263B has internal high-side and low-side
N-Channel MOSFET gate-drivers. The LGATE driver is
1.6
1.4
1.2
optimized for low duty-cycle applications where the low-side
MOSFET conduction losses are dominant. The LGATE
pull-down resistance is very low in order to clamp the
gate-source voltage of the MOSFET below the V GS(th) at
turnoff. The current transient through the low-side gate at
1.0
0.8
0.6
0.4
Q GATE = 100nC
20nC
turnoff can be considerable due to the characteristic large
switching charge of a low r DS(ON) MOSFET.
0.2
0.0
0.0 0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Δ V BOOT_CAP (V)
FIGURE 7. BOOTSTRAP CAPACITANCE vs BOOT RIPPLE
VOLTAGE
12
FN6388.3
July 8, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6263BHRZ | 功能描述:直流/直流开关调节器 1-PHS INT DC/DC BUCK CNTRLR IMVP6 5X5 WIT RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL6263BHRZ-T | 功能描述:直流/直流开关调节器 1-PHS INT DC/DC BUCK CNTRLR IMVP6 5X5 WIT RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL6263C | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:5-Bit VID Single-Phase Voltage Regulator with Current Monitor for GPU Core Power |
| ISL6263CEVAL1 | 功能描述:EVAL BOARD 1 FOR ISL6263C RoHS:否 类别:编程器，开发系统 >> 评估板 - 线性稳压器 (LDO) 系列:* 产品变化通告:1Q2012 Discontinuation 30/Mar/2012 设计资源:NCP590MNDPTAGEVB Gerber Files 标准包装:1 系列:- 每 IC 通道数:2 - 双 输出电压:1.8V，2.8V 电流 - 输出:300mA 输入电压:2.1 ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 已供物品:板 已用 IC / 零件:NCP590MNDP 其它名称:NCP590MNDPTAGEVB-NDNCP590MNDPTAGEVBOS |
| ISL6263CHRZ | 功能描述:直流/直流开关调节器 1-PHS INT DC/DC BUCK CNTRLR IMVP-6 W/IMON RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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