M62295GP Просмотр технического описания (PDF) - Renesas Electronics

Номер в каталоге

Компоненты Описание

производитель

M62295GP

LCD Back-light Control IC

Renesas Electronics 

M62295GP

• ON/OFF control function (P/C)

VCC

P/C

Figure 3 Connection Example for P/C

ON/OFF control is available using P/C terminal. As shown in Figure 3, ON/OFF control is made by connecting P/C

terminal to VCC or GND or by making P/C terminal open.

P/C = VCC: IC in normal operation mode

P/C = GND & OPEN: IC operation at halt

• Light control function (Adj2)

Figure 4 shows the connections of Adj2 terminal.

When the light control voltage is 2.4 V 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.

Figure 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 0.1 V to 2.4 V.

When the voltage is 2.4 V or more, light control duty becomes minimum (10%), and when it is 0.1 V 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 Figure 6 (a) to Figure 6 (c). Figure 6 (a) shows 100% light

controlled state, Figure 6 (b) middle state (50% light controlled), Figure 6 (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

Figure 4 Connections of Adj2 Terminal

100

80

60

40

20

10

0.1

1.0 1.4 2.0 2.4

Adj2 Terminal Voltage (V)

Figure 5 Adj2 Terminal Voltage-light Control Duty Characteristics

REJ03D0856-0201 Rev.2.01 Nov 14, 2007

Page 5 of 10

Share Link: