Skyworth 42E68 - Block Diagram

AOZ1051PI
Rev. 1.0 June 2011 www.aosmd.com Page 3 of 14
Block Diagram
Absolute Maximum Ratings
Exceeding the Absolute Maximum Ratings may damage the
device.
Note:
1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model rating: 1.5 k
 in series with 100 pF.
Recommended Operating Conditions
The device is not guaranteed to operate beyond the Maximum
Recommended Operating Conditions.
Note:
2. The value of
4
JA
is measured with the device mounted on a 1-in
2
FR-4 board with 2 oz. Copper, in a still air environment with
T
A
= 25 °C. The value in any given application depends on the
user’s specific board design.
500kHz
Oscillator
AGND
PGND
VIN
EN
FB
SS
COMP
LX
OTP
Internal
+5V
ILimit
PWM
Control
Logic
5V LDO
Regulator
UVLO
& POR
Softstart
Reference
& Bias
0.8V
SS
5μA
Q1
Q2
PWM
Comp
Level
Shifter
+
FET
Driver
ISen
EAmp
+
–
+
–
+
–
+
Parameter Rating
Supply Voltage (V
IN
) 20 V
LX to AGND -0.7 V to V
IN
+0.3 V
LX to AGND (20 ns) -5 V to 22 V
EN to AGND -0.3 V to V
IN
+0.3 V
FB, SS, COMP to AGND -0.3 V to 6.0 V
PGND to AGND -0.3 V to +0.3 V
Junction Temperature (T
J
) +150 °C
Storage Temperature (T
S
) -65 °C to +150 °C
ESD Rating
(1)
2.0 kV
Parameter Rating
Supply Voltage (V
IN
) 4.5 V to 18 V
Output Voltage Range 0.8 V to 0.85 • V
IN
Ambient Temperature (T
A
) -40 °C to +85 °C
Package Thermal Resistance
Exposed Pad SO-8 (4
JA
)
(2)
50 °C/W