XC9133 TOREX [Torex Semiconductor], XC9133 Datasheet - Page 12

• Manufacturer Part Number: XC9133
• Description: Step-Up DC/DC Converter-LED Backlight Driver
• Manufacturer: TOREX [Torex Semiconductor]

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■TEST CIRCUITS
1. The measurement method of L
Using the circuit ④, Lx ON resistance can be measured by adjusting V
driver transistor is ON.
The oscilloscope is used for measuring the Lx voltage when the driver transistor is ON.
2. The measurement method of current limit I
Using the circuit ④, current limit I
decreased while V
The oscilloscope is used for measuring the Lx voltage when the driver transistor is ON.
XC9133
V
●Circuit ① (XC9133B02A Series)
●Circuit ②
●Circuit ④
IN
R
R
I
LIM
SWON
PULL
= (V
(ceramic)
＝
4.7μF
C
= 0.4 / ((V
10Ω
IN
PULL
V
CE
PULL
V
CE
- V
Series
IN
CDRH3D16
L:22uH
LX
voltage is adjusted and Lx voltage V
V
) / R
PULL
SS
PULL
FB
- 0.4) /10)
Lx
XBS053V15R
X
SBD
R
ON Resistance R
LED
LIM
can be calculated by the equation including V
LIM
V
SWON
(ceramic)
0.22μF
C
L
LX
when the driver transistor is ON.
●Circuit ③
PULL
voltage to set Lx voltage V
PULL
voltage when FB voltage is
LX
0.4V when the