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PDF TDA7475A Data sheet ( Hoja de datos )

Número de pieza TDA7475A
Descripción ELECTRO-LUMINESCENT DISPLAY DRIVER
Fabricantes STMicroelectronics 
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® TDA7475A
ELECTRO-LUMINESCENT DISPLAY DRIVER
INTERNAL CLOCK GENERATION
STAND-BY FUNCTION
VOLTAGE SET-UP CONVERSION FUNC-
TION
ANTI-RADIATION TRAPEZOIDAL WAVE FOR
E.L. DISPLAY DRIVING
CONSTANT CURRENT CHARGE/DIS-
CHARGE OF E.L. DISPLAY
2-STEP BRIGHTNESS CONTROL (NORMAL
OR DIMMED LUMINANCE)
PROTECTIONS WITH AUTOMATIC RESET:
- COIL-SWITCHING MOS OVERCURRENT
- CHIP OVERTEMPERATURE
BCD OFF-LINE TECHNOLOGY
PowerSO16
ORDERING NUMBER: TDA7475A
DESCRIPTION
The TDA7475 is a new BCD OFF-LINE technol-
ogy device intended for EL display lighting in car-
radio applications. Time-extended luminance is
achieved by driving the display with constant-cur-
BLOCK DIAGRAM
rent pulses, which will automatically compensate
for the ageing-related capacitance loss by provid-
ing more elevated voltage pulses.
CCO
LSW
DSW
CCHG
VCC
16
VCCO
15
GATE
13
VDC VDC-sen
11 3
CURRENT
LIMITER
OVER THERMAL
PROTECTION
VCC
SENSE
ERR. AMP.
GATE
DRIVER
PWM COMP
QS
R
-
+
-
+
EL1
10
CEL
EL2
9
ICP
ICN
INTERNAL
VOLTAGE
SOURCE
OVER
VOLTAGE
PROTECTION
STAND-BY
1
TAB-GND
2
VSB
ISET-N
4
ISET-D
5
RN RD
14
P-GND
DIMMER
CONTROL
6
VDM
D98AU980
EL DRIVER CONTROL
7
CLKC
CCLK
f=8,4,2,1KHz
1/4 ~ 1/32
DIVIDER
f=32KHz
CLK OSC
8
CLKR
RCLK
November 2001
1/6

1 page




TDA7475A pdf
DIM.
A1
A2
A3
A4
a
b
c
D
D1
d
E (1)
E1
E2
E3
e
e1
F
G
L
R1
R2
T
T1
T2
MIN.
0
3.4
1.2
0.15
0.27
0.23
9.4
7.4
13.85
9.3
7.3
5.9
0.8
mm inch
TYP. MAX. MIN. TYP.
0.05 0.1 0 0.002
3.5 3.6 0.133 0.137
1.3 1.4 0.048 0.05
0.2 0.25 0.006 0.007
0.2 0.007
0.35 0.43 0.011 0.013
0.27 0.32 0.009 0.01
9.5 9.6 0.37 0.374
7.5 7.6 0.291 0.295
0.1 0.004
14.1 14.35 0.545 0.555
9.4 9.5 0.366 0.37
7.4 7.5 0.287 0.291
6.1 6.3 0.232 0.24
0.8 0.031
5.6 0.22
0.5 0.019
1.2 0.047
0.95 1.1 0.031 0.037
0.25
0.8 0.031
2° (min.), 5° (typ.), 8° (max.)
6° (typ.)
10° (typ.)
MAX.
0.004
0.141
0.052
0.01
0.017
0.012
0.377
0.299
0.565
0.374
0.295
0.248
0.043
0.01
(1) Resin protrusions not included (max value: 0.1mm per side).
TDA7475A
OUTLINE AND
MECHANICAL DATA
PowerSO16
L
16
G
E2
b a M L MC
9 T2
M
E
U
T1
F
E1 E3
1 8 R2 R1
T1
A2
A3
e
e1
D
D1
SET DETAIL K
DETAIL J
SET DETAIL K
R1
R1 A4
T2
SEE DETAIL J
C SEATING
PLANE
A1 d C
Leads coplanarity
T
L
GAUGE PLANE
0.35
PSO16MEC
5/6

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