SC4810B Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
componentes Descripción
Fabricante
SC4810B
Semtech Corporation
SC4810B Datasheet PDF : 24 Pages
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SC4810B/E
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: VDD = 12V, CSS = 1nF, FOSC = 420kHz, RT = 10k, CT = 220pF, DMAX = 2V, RDELAY = 75kΩ, TA = TJ = -40ºC to 105ºC
Parameter
Test Conditions
Min
Typ
Max
VREF Section
VREF (B/E version)
0 - 5mA
4.85
5
5.15
Line Under Voltage Lockout
Start Threshold
2.91
3
3.09
Hysteresis
150
Input Bias Current(1)
LUVLO = 3.2V
-100
Comparator Section
CS Input Current(1)
-200
PWM to OUT Propagation Delay
75
(No Load)(1)
Current Limit Section
Current Limit Threshold
590
625
660
ILIM to OUT Propagation Delay(1)
75
Soft Start Section
ISS
Shutdown Threshold
VSS = 0V
-2.5
-5
-7.5
500
Oscillator Section
Frequency Range (2)
50
1100
RCT Peak Voltage
3.00
RCT Valley Voltage
0.05
Maximum Duty Cycle
DMAX = 2.8V, OUT1
85
Maximum Duty Cycle
DMAX = 1.25V, OUT1
29
Frequency
380
420
460
Sync/CLOCK
Clock SYNC Threshold
Positive Edge Triggered
2
Minimum Sync Input Pulse Width(1)
FSYNC > Fosc
50
Unit
V
V
mV
nA
nA
ns
mV
ns
µA
mV
kHz
V
V
%
%
kHz
V
ns
2006 Semtech Corp.
3
www.semtech.com
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