参数资料
| 型号： | ISL6564IR-T |
| 厂商： | Intersil |
| 文件页数： | 10/27页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 40-QFN |
| 标准包装： | 4,000 |
| 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) |
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ISL6564
Functional Pin Description
VCC
Supplies all the power necessary to operate the chip. The
controller starts to operate when the voltage on this pin
exceeds the rising POR threshold and shuts down when the
voltage on this pin drops below the falling POR threshold.
Connect this pin directly to a +5V supply or through a series
300 ? resistor to a +12V supply.
GND
Bias and reference ground for the IC.
EN
This pin is a threshold-sensitive enable input for the
controller. Connecting the 12V supply to EN through an
appropriate resistor divider provides a means to synchronize
power-up of the controller and the MOSFET driver ICs.
When EN is driven above 1.29V, the ISL6564 is active
depending on status of ENLL, the internal POR, and pending
fault states. Driving EN below 1.16V will clear all fault states
and prime the ISL6564 to soft-start when re-enabled.
ENLL
This pin is a logic-level enable input for the controller. When
asserted to a logic high, the ISL6564 is active depending on
status of EN, the internal POR, VID inputs and pending fault
states. Deasserting ENLL will clear all fault states and prime
the ISL6564 to soft-start when re-enabled.
When floating, ENLL pin will be pulled to high internally with
a typical voltage as 1.15V.
FS
A resistor, RT, placed from FS to ground will set the
switching frequency. There is an inverse relationship
between the value of the resistor and the switching
frequency. See Figure 15 and Equation 29.
VID5, VID4, VID3, VID2, VID1, and VID0
These are the inputs to the internal DAC that provides the
reference voltage for output regulation. Connect these pins
either to open-drain outputs with or without external pull-up
resistors or to active-pull-up outputs. VID5-VID0 have 45μA
internal pull-up current sources that diminish to zero as the
voltage rises above the logic-high level. These inputs can be
pulled up as high as VCC plus 0.3V.
VDIFF, VSEN, and RGND
VSEN and RGND form the precision differential remote-
sense amplifier. This amplifier converts the differential
voltage of the remote output to a single-ended voltage
referenced to local ground. VDIFF is the amplifier ’s output
and the input to the regulation and protection circuitry.
Connect VSEN and RGND to the sense pins of the remote
load.
10
FB and COMP
Inverting input and output of the error amplifier, respectively.
FB is connected to VDIFF through a resistor. A negative
current, proportional to output current is present on the FB
pin. A properly sized resistor between VDIFF and FB sets
the load line (droop). The droop scale factor is set by the
ratio of the ISEN resistors and the lower MOSFET r DS(ON) .
COMP is tied back to FB through an external R-C network
with no DC connection to compensate the regulator.
DAC and REF
The DAC output pin is the output of the precision internal
DAC reference. The REF input pin is the positive input of the
Error Amp. In typical applications, a 1k ? , 1% resistor is used
between DAC and REF to generate a precise offset voltage.
This voltage is proportional to the offset current determined
by the offset resistor from OFS to ground or VCC. A
capacitor is used between REF and ground to smooth the
voltage transition during Dynamic VID? operations.
PWM1, PWM2, PWM3, PWM4
Pulse-width modulation outputs. Connect these pins to the
PWM input pins of the Intersil driver IC. The number of
active channels is determined by the state of PWM3 and
PWM4. Leave PWM4 unconnected and tie PWM3 to VCC to
configure for 2-phase operation. Tie PWM4 to VCC to
configure for 3-phase operation. Tie both PWM4 and PWM3
to high for 1-phase operation.
ISEN1+, ISEN1-; ISEN2+, ISEN2-; ISEN3+, ISEN3-;
ISEN4+, ISEN4-
The ISEN+ and ISEN- pins are current sense inputs to
individual differential amplifiers. The sensed current is used
as a reference for channel balancing, protection, and
regulation. Inactive channels should have their respective
sense inputs left open (for example, for 3-phase operation
open ISEN4+).
For DCR sensing, connect each ISEN- pin to the node
between the RC sense elements. Tie the ISEN+ pin to the
other end of the sense capacitor through a resistor, R ISEN .
The voltage across the sense capacitor is proportional to the
inductor current. The sensed current is proportional to the
output current, and scaled by the DCR of the inductor,
divided by R ISEN .
When configured for r DS(ON) current sensing, the ISEN1-,
ISEN2-, ISEN3-, and ISEN4- pins are grounded at the lower
MOSFET sources. The ISEN1+, ISEN2+, ISEN3+, and
ISEN4+ pins are then held at a virtual ground, such that a
resistor connected between them, and the drain terminal of
the associated lower MOSFET, will carry a current
proportional to the current flowing through that channel. The
current is determined by the negative voltage developed
across the lower MOSFET’s r DS(ON) , which is the channel
current scaled by r DS(ON) .
FN9156.2
December 27, 2004
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| ISL6564IRZ | 功能描述:电流型 PWM 控制器 MULTI-PHS PWM CNTRLR W/0 525-1 3 VID INDU 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 |
| ISL6564IRZ-T | 功能描述:电流型 PWM 控制器 MULTI-PHS PWM CNTRLR W/0 525-1 3 VID 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 |
| ISL6565ACB | 功能描述:IC REG CTRLR BUCK PWM VM 28-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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
| ISL6565ACB-T | 功能描述:IC REG CTRLR BUCK PWM VM 28-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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
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