TA8891N ,AKB (AUTOMATIC KINESCOPE BIAS) IC
TA8891N ,AKB (AUTOMATIC KINESCOPE BIAS) IC
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TA8891N
AKB (AUTOMATIC KINESCOPE BIAS) IC
TOSHIBA TA8891 N
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8891N
AKB (AUTOMATIC KINESCOPE BIAS) IC
TA8891N makes cut-off voltages and gains of R/G/B
outputs free from adjustment, and adjusts the white
balance of CRT automatically.
R/G/B inputs are DC coupling. Therefore, the brightness
which has been controlled on previous stage is effective.
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SDIP30-P-400-1.78
Weight : 1.999 (Typ.)
BLOCK DIAGRAM
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1 1 1 1
BLK BLK BLK
R Cut-off G Cut-off B Cut-off
Ad _ Ad . Ad .
R Gain G Gain B Gain
Ad . Ad . Ad .
Ref. Pulse
T1/T2 Pulse
Insertion
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1 2001-06-25
TOSHIBA
TA8891 N
TERMINAL FUNCTION
PIN No. PIN NAME FUNCTION INTERFACE CIRCUIT
1 Vcc Supply 12V. -
2 R Input The terminals for R/G/B inputs.
4 G Input Input signals with DC coupling, whose
B Input pedestal levels are 3.0V. 1000
Non-connected pins.
9 NC . -
10 Leave these pins open or grounded.
ND - -
. The terminal for horizontal blanking
Horizontal . .
13 Blankin input. Hor. BLK pulse IS used to blank
g R/G/B outputs and to generate T1/
T2 pulses.
The terminal for Ref. pulse output 1000
Reference (open collector). Ref. Pulse turn to low
15 Pulse during T1/T2 pulse period. T1 pulse is 2kQ I I
Output reference for cut-off, and T2 is for
The terminal for service mode SW.
Supplied 1.5V or more to this 10m
16 Service SW terminal, TA8891N turns to service Cl a
mode. On service mode, R/G/B E’ S’
outputs turn to T1 pulse levels.
TOSHIBA TA8891 N
PIN No. PIN NAME FUNCTION INTERFACE CIRCUIT
The terminal for SOFT START. Supplied VCC
0.9V or more to this terminal, cut-off
is set minimum.
17 Soft Start While cathode currents are not 1 Q a
enough right after POWER ON, supply A; cs'
0.9V or more and prevent that the Cut-OffAdJ-
screen starts with white.
The terminal for Vertical blanking
pulse. From the end of this pulse, T1
18 Vertical Blanking Input pulse are outputted during 1H, and
next 1H T2 pulses come out of R/G/B
outputs.
T1/T2 Pulse Generator
The terminals for R/G/B references
feed-back. The reference voltages, that
are transformed from cathode currents
by detection resistances, are fed-back. "II
19 B Ref. Feed-back
23 G Ref. Feed-back
27 R Ref. Feed-back
Cut-off Comparator
3 2001-06-25
TOSHIBA
TA8891 N
PIN No. PIN NAME
FUNCTION
INTERFACE CIRCUIT
20 B Drive Filter
24 G Drive Filter
28 R Drive Filter
The terminals for drive filters. These
filters hold the output of drive
comparators during IV.
Voltages of these terminals adjust R/
G/B gains so that feed-back voltages
during T2 become 5V.
Please use low leakage capacitors for
these filters.
Drive Comparator
Adjustment
21 B Cut-off Filter
25 G Cut-off Filter
29 R Cut-off Filter
The terminals for cut-off filters. These
filters hold the output of cut-off
comparators during IV.
Voltages of these terminals adjust R/
G/B cut-off voltages so that feed-back
voltages during T1 become 0.5V.
Please use low leakage capacitors for
these filters.
Cut-off
1k9. Com parator
Cut-off
Adjustment
22 B Output
26 G Output
30 R Output
The terminals for R/G/B outputs.
Output levels during BLK period is
TOSHIBA
TA8891 N
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Power Supply Voltage VCC 15 V
Inputted Signal Level elN 0~Vcc V
R/G/B Output Current IOUT 3.5 mA
Power Dissipation PD(Note) 1.6 W
Operating Temperature Topr -20-65 °C
Storage Temperature Tstg - 55--150 ''C
(Note) When using the device at above Ta =25°C, decrease the power dissipation by 12.8mW
for each increase of 1°C.
ELECTRICAL CHARACTERISTICS
DC voltage characteristics (Unless otherwise specified, Vcc=12V, Ta =25°C)
CHARACTERISTIC SYMBOL 2rsl TEST CONDITION MIN. TYP. MAX. UNIT
Current Consumption ICC - Vcc=12V 50 65 85 mA
Input Dynamic Range VIN - (Note 1) 5.0 7.0 - Vp-p
Maximum Gain Gm - (Note 2) 1.0 3.0 5.0 dB
Gain Variable Range Gr - (Note 3) 10 12 13 dB
Cut-off Control Variable Range AVCUT - (Note 4) 1.5 2.0 - V
Cut-off Control Sensitivity 3C - (Note 5) -0.4 -0.7 -1.0
Frequency Characteristics f - (Note 6) 10 15 - MHz
Cross-talk Among Channels CpTV - (Note 7) - -50 -40 dB
H. BLK Detection Level VHBLK - (Note 8) 1.5 1.7 1.9 V
V. BLK Detection Level VVBLK - (Note 9) 4.0 5.0 6.0 V
BLK Output Level VOL - (Note 10) - 1.0 1.5 V
Black Detection Level V 0.4 0.55 0.7
White Detection Level ('d, - (Note 11) 4.0 5.0 6.0 V
Thermal Drift Of Black Det. Level AV /AT - 0 i1 0
Thermal Drift Of White Det. Level AVB/AT - (Note 12) - o 12 mV/ C
Cross-talk Of Black Det. Level AV - 0 i 10
Cross-talk Of White Det. Level AVSV - (Note 13) - o i 100 mV
Output Sag During a Vertical Period vos - 0 i 100
Difference Of Output Sag Among AVOS - (Note 14) - 0 $50 mV
Channels
Reference Pulse Output Level VTO - (Note 15) - O 0.3 V
Output Level On Service Mode VSV - (Note 16) 2.6 3.1 3.6 V
Soft Start Det. Level l/SS - (Note 17) 0.8 0.9 1.0 V
Output DC Level VOUT - (Note 18) 2.5 3.0 3.5 V
TOSHIBA TA8891 N
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
D f Bl k D . L I
ependence 0 ac et eve Upon VBVcc - 0 10 mV
Vcc - (Note 19)
Dependence Of White Det. Level V 0 0 1 V
Atv1 - 0 200
. - Note 20
Delay Of Ver BLK Atvz ( ) - 0 200 ns
AtH1 - 0 200
. - Note 21
Delay Of Hor BLK AtHz ( ) - 0 200 ns
6 2001-06-25
TEST CONDITION
MEASUREMENT CONDITION (VCC = 12V, Ta = 25 11°C)
No. ITEM
SW & VR MODE
55 55v
SHBLSVBL Sin
MEASUREMENT METHOD
1 Input Dynamic ON
OFF OFF
OFF OFF ON
(1) Cut-off Filter Voltage : Vc=6.5V
Drive Filter Voltage : VD=6.0V
(2) Measure R/G/B outputs while increasing R/G/B
inputs from 0 to 12V.
RGB Output
V1 V2 In
(3) Measure V1 and V2, and caluculate ;
VIN =V2 -V1
2 Maximum Gain ON
OFF OFF
OFF OFF ON
(1)VD=12V, Vc=6.5V, vin =5\/
(2) Input a 0.5Vp-p, SOOkHz signal into RlG/B input.
(3) Measure R/G/B output amplitude, which is Vout-
(4) Calculate ,-
6 =208 10— dB
m °g 0.5vp.p ( )
3 Gain Variable 0N
OFF OFF
OFF OFF ON
(1) Vc=6.5V, Vin =6V
(2) Input a 0.5Vp-p, 500kHz signal into R/G/B input.
(3) Measure RlG/B output amplitude with VD =0V,
which is Vmin- And measure the amplitude with
VD=12VI Which is Vmax-
(4) Calculate ;
= 1 — B
G, 20€og 0 Vmin (d )
TA8891N - 7
TOSHIBA
TA8891 N
MEASUREMENT CONDITION (Vcc =12V, Ta = 25 i 1°C)
SW 8: VR MODE
55 ssv SHBLSVBL
MEASUREMENT METHOD
Cut—off Control
Variable Range
OFF OFF OFF OFF OFF
(1) Vin = 6V, VD = 6V
(2) Measure the R/G/B output DC with Vc=OV. which
(3) Measure the output DC with Vc= 12V, which is
Vomin-
(4) Calculate ;
AVCUT = Vomax — Vomin (V)
Cut-off Control
Sensitivity
OFF OFF OFF OFF OFF
(1) Vin = 6V, VD: 6V
(2) Measure the R/G/B output DC with VC=5.5V, which
is V1.
(3) Measure the output DC with Vc=6.5V, which is V2.
(4) Calculate ;
Frequency
Characteristics
OFF OFF OFF OFF OFF
(1) Vc=5.5V, VD=6V, Vin =6V
(2) Input a 1.0Vp.p, SOOkHz signal into R/G/B input, and
measure the R/G/B output amplitude.
(3) Increase input frequency and measure the frequency
at which output amplitude is 3dB down against the
output for SOOkHz input.
Crosstalk Among
Channels
OFF OFF OFF OFF OFF
(1) Vc=6.5V, VD = 6V, Vin =5V
(2) Input a 1.0Vp.p, SOOkHz signal into R input, and
mea5ure the R output amplitude.
(3) Measure cross-talk levels from R to G and B.
H. BLK Detection
OFF OFF OFF ON ON
(1) Vc=6.5V, VD=6V, Vin =3V
(2) Increasing H. BLK pulse level. measure the pulse level
at which T1/T2 pulses appear on R/G/B outputs.
V. BLK Detection
OFF OFF OFF ON ON
(1) vc =6.5V, VD=6V, Vin =3v
(2) Increasing V. BLK pulse level, measure the pulse level
at which T1/T2 pulses appear on R/G/B outputs.
TA8891 N - 8
TOSHIBA
TA8891 N
MEASUREMENT CONDITION (Vcc =12V, Ta = 25 1' 1°C)
SW 8: VR MODE
MEASUREMENT METHOD
BLK Output Level
u)vc=65v,VD=6v,wn=3v
(2) Measure the R/G/B output level during BLK period,
which is VOL-
Black Detection
White Detection
u)wn=3nv
(2) Measure the T1/T2 pulse levels on R/G/B feed-back
terminal.
Thermal Drift of
Black Det. Level
Thermal Drift of
White Det. Level
u)wn=3ov
(2)Whiie varying Ta from -20°C to 70°C, measure the
thermal drift of black/white det. level.
Cross-talk of
Black Det. Level
Cross-talk of
White Det. Level
n)wn=3nv
(2) Mesure the cross-talk of T1/T2 pulses among R/G/B
channels.
TA8891 N - 9
TOSHIBA
TA8891N
MEASUREMENT CONDITION (Vcc = 12V, Ta = 25 i1°C)
SW & VR MODE
MEASUREMENT METHOD
Output Sag
During 3 Vertical
Period
Difference of
Output Sag
Among Channels
u)wn=3ov
(2) Observe R/G/B outputs by oscilloscope, and measure
the output sag during a vertical period on each
channel.
(3) Measure the differences of output sag among
channels.
Refe rence Pulse
Output Level
(1) Observe the reference pulse on terminal TTO by
oscilloscope, and measure the low level of that pulse.
|— Vcc
‘— Vro
Output Level on
Service Mode
(1) Vin = 3.0V, vc =6.5V, VD = 6.0V
(2) Measure R/G/B output DC level.
SOFT START Det.
(1) Vin = 3.0V
(2) While observing T1/T2 pulses on R output, increase
the V5 from 0V and measure the V5 level at which
T1/T2 pulses have some change.
TA8891N - 10
TOSHIBA
TA8891N
MEASUREMENT CONDITION (Vcc = 12V, Ta = 25 i 1°C)
SW 8: VR MODE
So 55 Ssv SHBLSVBL
MEASUREMENT METHOD
Output DC Level
OFF OFF OFF OFF OFF
(1) Vin =3.ov, vD= 6.0V, Vc=6.5V
(2) Measure R/G/B output DC levels.
Dependence of
Black Det. Level
Upon Vcc
Dependence of
White Det. Level
Upon Vcc
ON ON OFF ON ON
(2)Whi|e varying VCC from 11V to 13V, measure the
changes of T1/T2 pulses on R/G/B outputs.
Delay of Ver.
OFF OFF OFF ON ON
(1) Vin = 3.0V, VD = 6.0V, vc = 6.5V
(2) Observe the vertical BLK input pulse on pin 18 and
ver. BLK output on RlG/B outputs.
(3) Measure MW and Atvz.
—— RIGIB outpu‘m
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TA8891 N - 11
TOSHIBA
TA8891 N
No_ ITEN
MEASUREMENT CONDITION (Vcc =12V, Ta = 25 1'1°C)
SW & VR MODE
MEASUREMENT METHOD
21 Delay of Hor.
(1) Vin =3.ov, VD =6.0V, Vc=6.5V
(2) Observe the horizontal BLK input pulse on pin 13 and
her. BLK output on R/G/B outputs.
(3) Measure MI.” and AtHz.
—— pin13
RIG I B outputs
Atm MHz
TA8891!“ - 12
TOSHIBA
TA8891 N
‘ l 10k0 l
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47sz |
5 - + v
—I — Vcc R Output
0.01 #F
WW R Input R Cut-off
Filter
1sz W -
10k 3 RDrive
Q (“3: NC Filter
m”— h G Input R Ref.
HY WnflF
Feed—back
0 w NC G Output
Oma— m 3 Input G Cut-off
-Iw»-o/ ”‘
Filter
GDrive
Filter
G Ref.
5ND Feed-back
oo/o IN OUT 1
NC B Output
6c) 63 (a 65 C24 Ca ® (2 63 Cat
NC B_Cut-off
Filter C /
GND 8 Drive
Filter
8 Ref.
4 7k!) NC Feed-back
(:3 s A
' H BLK 3
1'5”) 5 0r- Ver. BLK@_—q\
_ v, Input Input w
9 % A a E
'— @ NC Soft Start \l)——Qr-
750 I m - f5; Ref. Pulse Service 5;
10k0 J) VOutput SW
Hor. BLK
Ver. BLK
TEST CIRCUIT
TOSHIBA
TA8891 N
TOSHIBA
TA8891 N
OUTPUT LEVEL
OUTPUT LEVEL
CUT-OFF CONTROL CHARACTERISTICS
Drive Filter Voltage = 5.5V
Input Level=3.0V
Vcc: 12V
0 2 4 6 8 1O 12
CUT-OFF FILTER VOLTAGE (V)
Fig.3 IN / OUTPUT CHARACTERISTICS
Cut-off Filter Voltage=4.5V
Drive Filter Voltage-- 5.5V
Vcc=12V
0 2 4 6 8 10 12
INPUT LEVEL (V)
DRIVE CONTROL CHARACTERISTICS
Cut-off Filter Voltage=4_5V
Input Voltage = 2V0Vp_p
(10kHz, 5V Center)
Vcc=12V
2 4 6 8 10 12
DRIVE FILTER VOLTAGE (V)
CRT Drive
O+B1aov
Hor.BLK
To V/C/DIC
Vcc=12V
R Input
G Input
8 Input
1Q)@QD@@@T®Q9T@
Hor. BLK
Ref. Pu | 5e
Output
R Output W—(fi
R Cut-off:~)_n_+ ' .
Filter ‘° 1,uF
R Drive TO I
Filter m 2.2l E
R Ref. z
Feed—back “(Q
G OutputW—Qg
G Cut-off®—+fl_—-
Filter 1/”:
G Drive Eg>——1f——E
Fi Iter
FGeeRj-ffiack W_@
B Output W_®
B Cut-offg
Filter — I;
B Drive NHl—fi
Filter c’ZZXIF
8 Ref‘ d
Feed-back ‘0 “7
Ver. BLK®_M—O
Input 331(0
Soft Start H
®—°/°'Q
CRT Drive
CRT Drive
CRT Drive
Service
Ver.BLK
APPLICATION CIRCUIT
TOSHIBA
TA8891 N
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TOSHIBA TA8891 N
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
17 2001-06-25
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