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PDF M62295 Data sheet ( Hoja de datos )
| Número de pieza | M62295 | |
| Descripción | LCD BACK-LIGHT CONTROL IC | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de M62295 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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MITSUBISHI(Standard Linear ICs)
MM6622229955GGP P
LCDPBCABCAKCK-L-ILGIGHHTTCCOONNTTRROOLLICIC
DESCRIPTION
M62295GP is a semiconductor integrated circuit designed for PC
back- light control, which employs 2 output totempole output circuit
specifically suitable for inverter drive with piezo device.
Such necessary functions as light control, protection circuit are
housed in 16pin SSOP package. This allows for simplified peripheral
circuit as well as compact and thin set design.
FEATURES
• Direct drive to n-ch/ p-ch MOSFET
• Fixed output duty: 45%
• Output current (peak) : ± 300mA
• Light control
• Pulse synchronous control
Output OFF period is adjusted synchronous with the OSC
frequency (1kHz-200kHz).
• Light control available from 10%(MIN.) up to 100% by the
voltage applied from outside (Adj2 terminal).
• Protection functions
• 2 kinds of timer-latch time setting available by 3 triggers
(few seconds, several tens of seconds set by external capacitor)
APPLICATION
• CLD Back-light contorol for Note P.C etc.
PIN CONFIGURATION (TOP VIEW)
G2 1
GND 2
N.C 3
Adj2 4
Vref 5
Cscp1 6
Cscp2 7
Iscp 8
16 G1
15 Vcc
14 P/C
13 CT2
12 CT1
11 RT
10 FB
9 IN -
Outline 16P2E-A
N.C : NO CONNECTION
BLOCK DIAGRAM
5
Vref
Ref. volt.
Vcc
15
UVLO
P/C RT CT1
14 11 12
ON/OFF
OSC.
CT2
13
VCC
1
G2
9
IN -
1.25V
2.5V
0.25V
2 10
GND FB
VCC
Protection
Circuit
(Timer Latch)
6 78
Cscp1 Cscp2 Iscp
34
N.C Adj2
(1/7)
16
G1
1 page  
MITSUBISHI(Standard Linear ICs)
M62295GP
PC BACK- LIGHT CONTROL IC
• Light control function (Adj2)
Fig.4 shows the connections of Adj2 terminal.
When the light control voltage is 2.4V or more,
divided voltage by the resistors is applied. Light
control is decided by the OSC. frequency of CT2
and the applied voltage to Adj2 terminal.
Fig.5 shows how the applied voltage to Adj2
terminal relates itself to light control.
The voltage range of Adj2 terminal available for
light control is 0.1V to 2.4V.
When the voltage is 2.4V or more, light control
duty becomes minimum(10%), and when it is
0.1V or less, light control duty becomes 100%.
Minimum duty is available by connecting Adj2
terminal to Vref terminal.
Output waveform on above mentioned stage is
shown in Fig.6(a) to Fig.6(c). Fig6(a) shows
100% light controlled state, Fig.6(b) middle state
(50% light controlled), Fig6(c) minimum duty
state.
Light control
voltage
Adj2
Light control
voltage
R1
R2 Adj2
(a). In the case of direct
applying to Adj2 terminal
(b). In the case of applying
to Adj2 terminal by the
division of resistors
Fig.4 Connections of Adj2 terminal
100
80
60
Formula for light control level by light control voltage
2.4 - VAdj2
ONDuty = (100 - ONDutyMin) *
+ONDutyMin (%)
2.4
VAdj2 : Adj2 terminal voltage (V)
ONDutyMin = 10 (%)
40
20
10
0.1 1.0 1.4 2.0 2.4
Adj2 terminal voltage (V)
Fig.5 Adj2 terminal voltage-
light control duty characteristics
G1 output
G2 output
CT2 wave form
Fig.6(a) 100% light control
G1 output
G2 output
CT2 wave form
G1 output
G2 output
CT2 wave form
Fig.6(a) 50% light control
Fig.6(a) 10% light control
(5/7)
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet M62295.PDF ] | |
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