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參數資料
| 型號： | E-L6917BD |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | ROHS COMPLIANT, SO-28 |
| 文件頁數： | 1/33頁 |
| 文件大小： | 465K |
| 代理商： | E-L6917BD |
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L6917B
September 2002
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2 PHASE OPERATION WITH
SYNCRHONOUS RECTIFIER CONTROL
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ULTRA FAST LOAD TRANSIENT RESPONSE
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INTEGRATED HIGH CURRENT GATE
DRIVERS: UP TO 2A GATE CURRENT
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TTL-COMPATIBLE 5 BIT PROGRAMMABLE
OUTPUT COMPLIANT WITH VRM 9.0
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0.8% INTERNAL REFERENCE ACCURACY
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10% ACTIVE CURRENT SHARING
ACCURACY
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DIGITAL 2048 STEP SOFT-START
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OVERVOLTAGE PROTECTION
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OVERCURRENT PROTECTION REALIZED
USING THE LOWER MOSFET’S RdsON OR A
SENSE RESISTOR
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300 kHz INTERNAL OSCILLATOR
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OSCILLATOR EXTERNALLY ADJUSTABLE
UP TO 600kHz
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POWER GOOD OUTPUT AND INHIBIT
FUNCTION
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REMOTE SENSE BUFFER
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PACKAGE: SO-28
APPLICATIONS
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POWER SUPPLY FOR SERVERS AND
WORKSTATIONS
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POWER SUPPLY FOR HIGH CURRENT
MICROPROCESSORS
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DISTRIBUTED DC-DC CONVERTERS
DESCRIPTION
The device is a power supply controller specifically
designed to provide a high performance DC/DC con-
version for high current microprocessors.
The device implements a dual-phase step-down con-
troller with a 180
° phase-shift between each phase.
A precise 5-bit digital to analog converter (DAC) al-
lows adjusting the output voltage from 1.100V to
1.850V with 25mV binary steps.
The high precision internal reference assures the se-
lected output voltage to be within
±0.8%. The high
peak current gate drive affords to have fast switching
to the external power mos providing low switching
losses.
The device assures a fast protection against load
over current and load over/under voltage. An internal
crowbar is provided turning on the low side mosfet if
an over-voltage is detected. In case of over-current,
the system works in Constant Current mode.
SO-28
ORDERING NUMBERS:L6917BD
L6917BDTR (Tape & Reel)
5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
BLOCK DIAGRAM
CURRENT
READ ING
CURRENT
READ ING
IFB
TOTAL
CURR ENT
AVG
CU RRENT
CH 1 OVER
CU RR ENT
CH 2 OVER
CU RR ENT
DAC
DIGI TAL
SO FT STA RT
LOGIC
PWM
ADAPTIVE
ANTI
CROSS-CONDUCTION
LOGIC
PWM
ADAPTIVE
ANTI
CROSS-CONDUCTION
CH1 OVER
CU RR ENT
CH 2 OVER
CURR ENT
LO GIC
AND
PROTECTIONS
2 PH ASE
OSCILLATOR
PWM1
CURRENT
CORRECTION
PWM2
CURRENT
CORRECTION
ERROR
AMPLIFIER
REMOT E
BUF FER
10k
LS
HS
Vcc
HS
BOOT 1
UGATE1
PH ASE1
LG ATE1
ISEN1
PGNDS 1
PGND
PGNDS 2
ISEN2
LG ATE2
PH ASE2
UGATE2
BOOT 2
Vc c
COMP
FB
VSEN
FBG
FBR
VID0
VID1
VID2
VID3
VID4
PGO OD
ROSC / IN H
SG ND
VCCDR
10k
<>
+
-
+
-
VCC DR
VCC
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相關代理商/技術參數 |
參數描述 |
|---|---|
| E-L6917BDTR | 功能描述:DC/DC 開關控制器 Prog Dual-Phase Cont RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| E-L6919E | 功能描述:電流型 PWM 控制器 5-Bit Dual Ph Contlr RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| E-L6919ETR | 功能描述:電流型 PWM 控制器 5-Bit Dual Ph Contlr RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| E-L6920D | 功能描述:直流/直流開關轉換器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| E-L6920DTR | 功能描述:直流/直流開關轉換器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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