參數(shù)資料
型號(hào)： LT3751IUFD#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20
封裝： 4 X 5 MM, LEAD FREE, PLASTIC, QFN-20
文件頁(yè)數(shù)： 32/34頁(yè)
文件大?。?/td> 403K
代理商： LT3751IUFD#TRPBF
LT3751
7
3751fb
TYPICAL PERFORMANCE CHARACTERISTICS
RVTRANS (Pin 1/Pin 19): Transformer Supply Sense Pin.
Connect a resistor between the RVTRANS pin and the
VTRANS supply. Refer to Table 2 for proper sizing of the
RVTRANS resistor. The minimum operation voltage for
VTRANS is 4.75V.
UVLO1 (Pin 2/Pin 20): VTRANS Undervoltage Lockout Pin.
Senses when VTRANS drops below:
V
UVLO1 = 1.225 + 50μA RUVLO1
and trips the FAULT latch low, disabling switching. After
VTRANS rises above VUVLO1, toggling the CHARGE pin
reactivates switching.
OVLO1 (Pin 3/Pin 1): VTRANS Overvoltage Lockout Pin.
Senses when VTRANS rises above:
V
OVLO1 = 1.225 + 50μA ROVLO1
and trips the FAULT latch low, disabling switching. After
VTRANS drops below VOVLO1, toggling the CHARGE pin
reactivates switching.
UVLO2 (Pin 4/Pin 2): VCC Undervoltage Lockout Pin.
Senses when VCC drops below:
V
UVLO2 = 1.225 + 50μA RUVLO2
and trips the FAULT latch low, disabling switching. After
VCC rises above VUVLO2, toggling the CHARGE pin reac-
tivates switching.
OVLO2 (Pin 5/Pin 3): VCC OvervoltageLockoutPin.Senses
when VCC rises above:
V
OVLO2 = 1.225 + 50μA ROVLO2
and trips the FAULT latch low, disabling switching. After
VCC drops below VOVLO2, toggling the CHARGE pin reac-
tivates switching.
FAULT (Pin 6/Pin 4): Open Collector Indication Pin. When
either VTRANS or VCC exceeds the user-selected voltage
range, or an internal UVLO condition occurs, a transistor
turns on. The part will stop switching. This pin needs a
proper pull-up resistor or current source.
HVGATE Pin Clamp Voltage
–40
HVGA
TE
PIN
VOL
TAGE
(V)
11.0
10.9
10.8
10.7
10.5
10.6
10.4
40
60
0
80
100
3751 G19
120
20
TEMPERATURE (°C)
–20
VCC = 24V
CLAMP = 0V
–40
HVGA
TE
PIN
VOL
TAGE
(V)
5.70
5.65
5.60
5.55
5.50
40
60
0
80
100
3751 G20
120
20
TEMPERATURE (°C)
–20
VCC = 12V
CLAMP = 12V
PIN FUNCTIONS
DCM Trip Voltage (VDRAIN – VTRANS),
RVTRANS = RDCM = 25kΩ
–40
DCM
TRIP
VOL
TAGE
(V)
0.64
0.62
0.60
0.58
0.56
0.54
40
080
3751 G21
120
TEMPERATURE (°C)
VTRANS = 5V
VTRANS = 12V
VTRANS = 24V
VTRANS = 48V
(TSSOP/QFN)
相關(guān)PDF資料
PDF描述
LT3751EFE 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
LT3751EUFD#TRPBF 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20
LT3751EUFD 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20
LT3751IFE#TRPBF 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
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