SC417EVB Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
componentes Descripción
Fabricante
SC417EVB Datasheet PDF : 29 Pages
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SC417/SC427
Electrical Characteristics (continued)
Parameter
Conditions
Min Typ Max Units
Input Supplies (continued)
V5V Supply Current
FB On-Time Threshold
Frequency Range
Bootstrap Switch Resistance
ENL , EN/PSV = 0V
3
7
μA
SC417, EN/PSV = V5V, no load (fSW = 25kHz),
V > 500mV(2)
FB
SC427, EN/PSV = V5V, no load, V > 500mV(2)
FB
2
0.7
mA
f = 250kHz, EN/PSV = floating , no load(2)
10
SW
static V and load, 0 to +85 °C
IN
0.496 0.500 0.504 V
static V and load, -40 to +85 °C
IN
0.495
0.505 V
continuous mode operation
200
minimum f , (SC417 only), EN/PSV = V5V, no load
SW
1000
kHz
25
10
Ω
Timing
On-Time
Minimum On-Time (2)
continuous mode operation,
V = 15V, V = 5V, f = 300kHz, R = 133kΩ
IN
OUT
SW
TON
999 1110 1220 ns
50
ns
Minimum Off-Time (2)
250
ns
Soft-Start
Soft-Start Ramp Time (2)
850
μs
Analog Inputs/Outputs
VOUT Input Resistance
500
kΩ
Current Sense
Zero-Crossing Detector Threshold
LX - PGND
-3
0
+3
mV
Power Good
Power Good Threshold
Start-Up Delay Time
upper limit, V > internal 500mV reference
FB
lower limit, V < internal 500mV reference
FB
+20
%
-10
%
2
ms
Fault (noise immunity) Delay Time(2)
5
μs
Leakage
1
μA
Power Good On-Resistance
10
Ω
5
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