- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383158 > ISL6566A (Intersil Corporation) Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal PDF資料下載
參數(shù)資料
| 型號(hào)： | ISL6566A |
| 廠商： | Intersil Corporation |
| 英文描述： | Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal |
| 中文描述： | 三相降壓PWM控制器，帶有兩個(gè)集成MOSFET驅(qū)動(dòng)器和一個(gè)外部驅(qū)動(dòng)器的信號(hào) |
| 文件頁數(shù)： | 16/28頁 |
| 文件大小： | 784K |
| 代理商： | ISL6566A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
16
FN9200.2
July 27, 2005
the PHASE and UGATE voltages during a PWM falling edge
and the subsequent UGATE turn-off. If either the UGATE falls
to less than 1.75V above the PHASE or the PHASE falls to less
than +0.8V, the LGATE is released to turn on.
Internal Bootstrap Device
All three integrated drivers feature an internal bootstrap
schottky diode. Simply adding an external capacitor across
the BOOT and PHASE pins completes the bootstrap circuit.
The bootstrap function is also designed to prevent the
bootstrap capacitor from overcharging due to the large
negative swing at the PHASE node. This reduces voltage
stress on the boot to phase pins.
The bootstrap capacitor must have a maximum voltage
rating above PVCC + 5V and its capacitance value can be
chosen from the following equation:
where Q
G1
is the amount of gate charge per upper MOSFET
at V
GS1
gate-source voltage and N
Q1
is the number of
control MOSFETs. The
V
BOOT_CAP
term is defined as the
allowable droop in the rail of the upper gate drive.
Gate Drive Voltage Versatility
The ISL6566A provides the user flexibility in choosing the
gate drive voltage for efficiency optimization. The controller
ties the upper and lower drive rails together. Simply applying
a voltage from 5V up to 12V on PVCC sets both gate drive
rail voltages simultaneously.
Initialization
Prior to initialization, proper conditions must exist on the
ENLL, EN_PH3, VCC, PVCC and the VID pins. When the
conditions are met, the controller begins soft-start. Once the
output voltage is within the proper window of operation, the
controller asserts PGOOD.
Enable and Disable
While in shutdown mode, the PWM outputs are held in a
high-impedance state. This forces the drivers to short gate-
to-source of the upper and lower MOSFET’s to assure the
MOSFETs remain off. The following input conditions must be
met before the ISL6566 is released from this shutdown
mode.
1. The bias voltage applied at VCC must reach the internal
power-on reset (POR) rising threshold. Once this
threshold is reached, proper operation of all aspects of
the ISL6566A is guaranteed. Hysteresis between the
rising and falling thresholds assure that once enabled,
the ISL6566A will not inadvertently turn off unless the
bias voltage drops substantially (see
Electrical
Specifications
).
2. The voltage on ENLL must be above 0.66V. The ENLL
input allows for power sequencing between the controller
bias voltage and another voltage rail. The enable
comparator holds the ISL6566A in shutdown until the
voltage at ENLL rises above 0.66V. The enable
comparator has 60mV of hysteresis to prevent bounce.
3. The voltage on the EN_PH3 pin must be above 1.22V.
The EN_PH3 input allows for power sequencing between
the controller and the external driver.
4. The driver bias voltage applied at the PVCC pins must
reach the internal power-on reset (POR) rising threshold.
C
BOOT_CAP
Q
BOOT_CAP
-------------------------------------
≥
Q
GATE
Q
-----------------------------------
PVCC
GS1
N
Q1
=
(EQ. 12)
50nC
20nC
FIGURE 10. BOOTSTRAP CAPACITANCE vs BOOT RIPPLE
VOLTAGE
V
BOOT_CAP
(V)
C
B
(
μ
F
1.6
1.4
1.2
1.
0.8
0.6
0.4
0.2
0.0
0.3
0.0
0.1
0.2
0.4
0.5
0.6
0.9
0.7
0.8
1.0
Q
GATE
= 100nC
FIGURE 11. POWER SEQUENCING USING THRESHOLD-
SENSITIVE ENABLE (ENLL) FUNCTION
-
+
0.66V
EXTERNAL CIRCUIT
ISL6566A INTERNAL CIRCUIT
ENLL
+12V
POR
CIRCUIT
10.7k
1.40k
ENABLE
COMPARATOR
SOFT-START
AND
FAULT LOGIC
VCC
PVCC1
EN_PH3
-
+
1.22V
ISL6566A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6566ACR | Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal |
| ISL6566ACR-T | Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal |
| ISL6566ACRZ | Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal |
| ISL6566ACRZ-T | Wide Bandwidth 2-Input, 1-Output 3-Circuit Video Switch 16-SOIC -40 to 85 |
| ISL6566ACRZA | Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6566ACRZ | 功能描述:IC CTRLR PWM 3PHASE BUCK 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6566ACRZ-T | 功能描述:IC CTRLR PWM 3PHASE BUCK 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6566AIRZ | 功能描述:IC CTRLR PWM 3PHASE BUCK 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6566AIRZ-T | 功能描述:IC CTRLR PWM 3PHASE BUCK 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6566CR | 功能描述:IC CTRLR PWM BUCK 3PHASE 40-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。