SC4910A_16 Datasheet, PDF (2/19 Pages) Semtech Corporation – High Performance Secondary Side Controller with Synchronous Rectifier

SC4910A/B
POWER MANAGEMENT
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified
in the Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device
reliability.
Parameter
Symbol
Maximum
Units
Supply Voltage
Vcc
18
V
Output Voltage
Vcc
V
Phase
Vcc
V
FB, COMP, SYNC/EN, ISHARE
-0.3 to 7
V
OUTA & OUTB Current Source or Sink
150
mA
Junction Temperature Range
T_J
-40 to +150
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
T_STG
T_LEAD
-60 to +150
260
Electrical Characteristics
Unless
specified:
T_A
=
T
J
=
-40°C
to
125°C
,
V_CC
=
12V,
R
T1
=
R
T2
=
50K,
R
DELAY
=
50K,
C
SS
=
0.1µF.
Parameter
Test Conditions
Min
Typ
°C
°C
°C
Max
Unit
Power Supply
Operating Current
SYNC/EN = Low
10
15
mA
Undervoltage Lockout
Start Threshold
SC4910A
SC4910B
8.7
9.0
9.3
V
4.35
4.50
4.75
V
UVLO Hysteresis
SC4910A
SC4910B
400
550
700
mV
200
300
375
mV
VREF Reference
Output Voltage
SC4910A
SC4910B
4.75
5.0
5.25
V
2.97
3.30
3.63
V
Line Regulation
9.3V < Vcc < 15V
15
30
mV
Load Regulation
Soft Start
0mA < I_REF < 5mA
2
10
mV
SS Output
0.75
V
Voltage Accuracy
T_A = T_J = 25°C
-1
-1.5
+1
%
+1.5
Line Regulation
9.3V < Vcc < 15V
-5
0
+5
mV
Impedance ⁽²⁾
7K
Ω
 2005 Semtech Corp.
2
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