TDA4856/V6,112 NXP Semiconductors, TDA4856/V6,112 Datasheet - Page 38
TDA4856/V6,112
Manufacturer Part Number
TDA4856/V6,112
Description
Manufacturer
NXP Semiconductors
Datasheet
1.TDA4856V6112.pdf
(58 pages)
Specifications of TDA4856/V6,112
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Philips Semiconductors
2003 Sep 30
I
PC monitors
(1) See Fig.18.
Fig.19 I
2
C-bus autosync deflection controller for
no
mode.
2
C-bus flow for protection and standby
S
S
all other register contents are random
STDBY = 1?
Soft down sequence (XXXX XX00)
8CH
Protection mode (XXXX XX00)
8CH
Standby mode (XXXX XX01)
yes
A
A
registers are set
SOFTST = 0
SOFTST = 0
SOFTST = 0
STDBY = 0
STDBY = 1
STDBY = 0
1AH
1AH
L2
L4
(1)
A
A
SOFTST = 1?
00H
01H
L3
(1)
yes
A P
A P
MGL790
no
38
Protection and standby mode
Soft down sequence:
Protection mode:
Protection mode can be left by 3 ways:
1. Entering standby mode by setting control
2. Starting the soft start sequence by setting control
3. Decreasing the supply voltage below 8.1 V.
Standby mode:
Start the sequence by setting control bit SOFTST = 0
BDRV duty cycle decreases
HDRV duty cycle decreases.
Pins HDRV and BDRV are floating
Continuous blanking on pin CLBL is active
Pin HUNLOCK is floating
PLL1 and PLL2 are disabled
Register contents are kept in internal memory.
Set control bit STDBY = 1
Driver outputs are floating (same as protection mode)
Supply current is 9 mA
Only the I
operative
Contents of all registers are lost, except the value of
bit STDBY and bit SOFTST
See L2 of Fig.18 for continuation.
bit SOFTST = 0 and bit STDBY = 1
bit SOFTST = 1 (bit STDBY = don’t care);
see L3 of Fig.18 for continuation
2
C-bus section and protection circuits are
Product specification
TDA4856
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