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參數(shù)資料
| 型號(hào)： | LT3782 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 2-Phase Step-Up DC/DC Controller |
| 中文描述： | 2相升壓型DC / DC控制器 |
| 文件頁(yè)數(shù)： | 5/16頁(yè) |
| 文件大?。?/td> | 200K |
| 代理商： | LT3782 |
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LT3782
5
3782fa
PIU
SGATE2 (Pin 1):
Second Phase Synchronous Drive Sig-
nal. An external driver buffer is needed to drive the top
synchronous power FET.
SGATE1 (Pin 2):
First Phase Synchronous Drive Signal.
An external driver buffer is needed to drive the top syn-
chronous power FET.
NC (Pin 3):
Not Connected. Can be connected to GND.
GND (Pin 4):
Chip Ground.
SYNC (Pin 5):
Synchronization Input. The pulse width can
range from 10% to 70%. Note that the operating frequency
is half of the sync frequency.
DELAY (Pin 6):
When synchronous drivers are used, the
programmable delay that delays BGATE turns on after
SGATE turns off.
DCL (Pin 7):
This pin programs the limit of the maximum
duty cycle. When connected to V
RSET
, it operates at natural
maximum duty cycle, approximately 90%.
SENSE1
+
(Pin 8):
First Phase Current Sense Amplifier
Positive Input. An RC filter is required across the current
sense resistor. Current limit threshold is set at 60mV.
SENSE1
–
(Pin 9):
First Phase Current Sense Amplifier
Negative Input. An RC filter is required across the current
sense resistor.
SLOPE (Pin 10):
A resistor from SLOPE to GND increases
the internal current mode PWM slope compensation.
R
SET
(Pin 11):
A resistor from R
SET
to GND sets the
oscillator charging current and the operating frequency.
SENSE2
–
(Pin 12):
Second Phase Current Sense Amplifier
Negative Input. An RC filter is required across the current
sense resistor.
SENSE2
+
(Pin 13):
Second Phase Current Sense Amplifier
Positive Input. An RC filter is required across the current
sense resistor. Current limit threshold is set at 60mV.
SS (Pin 14):
Soft-Start. A capacitor on this pin sets the
output ramp up rate. The typical time for SS to reach the
programmed level is (C 2.44V)/10
μ
A.
V
C
(Pin 15):
The output of the gm error amplifier and the
control signal of the current loop of the current-mode
PWM. Switching starts at 0.7V, and higher V
C
voltages
corresponds to higher inductor current.
FB (Pin 16):
Error Amplifier Inverting Input. A resistor
divider to this pin sets the output voltage.
RUN (Pin 17):
LT3782 goes into shutdown mode when
V
RUN
is below 2.2V and goes to low bias current shutdown
mode when V
RUN
is below 0.3V.
NC (Pin 18):
Not Connected. Can be connected to GND.
VEE2 (Pin 19):
Gate Driver BGATE2 Ground. This pin
should be connected to the ground side of the second
current sense resistor.
BGATE2 (Pin 20):
Second Phase MOSFET Driver.
GBIAS2 (Pin 21):
Bias for Gate Driver BGATE2. Should be
connected to GBIAS or an external power supply between
12V to 14V. A bypass low ESR capacitor of 2
μ
F or larger
is needed and should be connected directly to the pin to
minimize parasitic impedance.
GBIAS1 (Pin 22):
Bias for Gate Driver BGATE1. Should be
connected to GBIAS2.
BGATE1 (Pin 23):
First Phase MOSFET Driver.
VEE1 (Pin 24):
Gate Driver BGATE1 Ground. This pin
should be connected to the ground side of the second
current sense resistor.
NC (Pin 25):
Not Connected. Can be connected to GND.
NC (Pin 26):
Not Connected. Can be connected to GND.
V
CC
(Pin 27):
Chip Power Supply. Good supply bypassing
is required.
GBIAS (Pin 28):
Internal 11V regulator output for biasing
internal circuitry. Should be connected to GBIAS1 AND
GBIAS2.
EXPOSED PAD (Pin 29):
The exposed package pad is
fused to internal ground and is for heat sinking. Solder the
bottom metal plate onto expanded ground plane for opti-
mum thermal performance.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3782A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:2-Phase Step-Up DC/DC Controller |
| LT3782AEFE | 制造商:LINER 制造商全稱:Linear Technology 功能描述:2-Phase Step-Up DC/DC Controller |
| LT3782AEFE#PBF | 功能描述:IC REG CTRLR BST PWM CM 28-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LT3782AEFE#PBF | 制造商:Linear Technology 功能描述:Switch Regulator IC |
| LT3782AEFE#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 28-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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