SC446

3

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Recommended Operating Conditions

Absolute Maximum Ratings

Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters

specified in the Electrical Characteristics section is not recommended.

NOTES-

(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

(2) Tested according to JEDEC standard JESD22-A114-B.

Electrical Characteristics

Thermal Information

V

Maximum Output Power ………………………………

22W

SW, OVPIN, OVPRTN, VOUT, IO1~IO3 Voltage …… -0.3 to 40V

IOSET Voltage ……………………………………… -0.3 to 2V

SS, COMP Voltage ………………………………… -0.3 to 4V

EN, PWM, Voltage …………………………… -0.3 to V

PGND to AGND ………………………………………

± 0.3V

Peak IR Reflow Temperature …………………………… 260°C

3.5kV

Input Voltage Range ……………………………… 4.5V~27V

Maximum Output Voltage ……………………………… 36V

Maximum LED Current ……………………………… 100mA

Maximum Junction Temperature ……………………… 150°C

Storage Temperature ………………………… -65 to +150°C

Lead Temperature (Soldering) 10 sec ………………… 260°C

Unless otherwise specified: V

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Input Supply

Under-Voltage Lockout Threshold

UVLO-TH

V

4.3

4.45

V

UVLO Hysteresis

UVLO-H

250

mV

V

I

IN_Q

No switching

3

mA

V

I

IN_S

EN / PWM = low

1

µA

Oscillator

Switching Frequency

F

S

0.56

0.7

0.84

MHz

Internal Power Switcher

Switch Current Limit

I

SW

2.5

3.32

A

Switch Saturation Voltage

V

SAT

I

200

350

mV

Switch Leakage Current

I

S_LEAK

0.1

1

µA

Maximum Duty Cycle

D

MAX

88

93

%

Minimum Duty Cycle

D

MIN

0

%

T

ON_MIN

100

ns

Compensation

Sourcing Current

I

EA_SOURCE

V

5

µA

Sinking Current

I

EA_SINK

V

6

µA