參數(shù)資料
型號(hào): LTC3721EUF-1
廠商: Linear Integrated Systems
英文描述: Push-Pull PWM Controller
中文描述: 推挽式PWM控制器
文件頁數(shù): 7/16頁
文件大?。?/td> 192K
代理商: LTC3721EUF-1
LTC3721-1
7
sn37211 37211fs
FB (Pin 13/Pin 12):
Error Amplifier Inverting Input. This is
the voltage feedback input for the LTC3721-1. The nomi-
nal regulation voltage at FB is 1.2V.
SS (Pin 14/Pin 13):
Soft-Start/Restart Delay Circuitry
Timing Capacitor. A capacitor from SS to GND provides a
controlled ramp of the current command. During overload
conditions, SS is discharged to ground initiating a soft-
start cycle. SS charging current is approximately 13
μ
A. SS
will charge up to approximately 5V in normal operation.
During a constant overload current fault, SS will oscillate
at a low frequency between approximately 0.5V and 4V.
DESCRIPTIO S
PI
U
UVLO (Pin 15/Pin 14):
Input to Program System Turn-On
and Turn-Off Voltages. The nominal threshold of the UVLO
comparator is 5.0V. UVLO is connected to the main DC
system feed through a resistor divider. When the UVLO
threshold is exceeded, the LTC3721-1 commences a soft-
start cycle and a 10
μ
A (nominal) current is fed out of UVLO
to program the desired amount of system hysteresis. The
hysteresis level can be adjusted by changing the resis-
tance of the divider. UVLO can also be used to terminate
all switching by pulling UVLO down to less than 4V. An
open drain or collector switch can perform this function
without changing the system turn on or turn off voltages.
NC (Pin 2, Pin 3, Pin 16/Pin 7, Pin 16):
Not Connected.
(GN Package/UF Package)
PROGRAMMABLE
DEAD-TIME
DRVA
DRVB
37211 TD01
CURRENT
SENSE
OR C
T
RAMP
PWM
COMPARATOR
(–)
TIW
U
W
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3721EUF-1#PBF 功能描述:IC REG CTRLR ISO PWM CM 16-QFN 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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 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
LTC3721EUF-1#TR 功能描述:IC REG CTRLR ISO PWM CM 16-QFN RoHS:否 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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 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
LTC3721EUF-1#TRPBF 功能描述:IC REG CTRLR ISO PWM CM 16-QFN 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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 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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