Datasheet

VIN
DR
FA/SD
FB
COMP
PGND
Under Voltage
Lockout
7.2V
LDO
internal Vcc
S
R
Q
DRIVER
Fixed Frequency
Detect
Oscillator
PWM
Isen
AGND
Softstart
logic
325mV
Short Circuit
Comparator
Vfb+Vovp
OVP
1.26V Reference
Gm
internal slope
compensation
THERMAL
LIMIT
(165°C)
slope compensation
ramp adjust current
source
Error
Amplifier
LM3478
LM3478-Q1
SNVS085V –JULY 2000–REVISED FEBRUARY 2013 www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, V
IN
= 12V, T
J
= 25°C.
Duty Cycle vs
Current Sense Voltage
Figure 22.
FUNCTIONAL BLOCK DIAGRAM
Figure 23.
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