PANASONIC AN5765

ICs for TV
AN5765
CRT heater voltage control IC
■ Overview
Unit: mm
(4.20)
0.60
(6.40)
7.70±0.20
12.50±0.10
■ Features
(7.80)
• Incorporating 4 values changeover output circuit
• Incorporating 5 V constant voltage output
• Incorporating reset function
• Incorporating current protection and thermal protection
circuit
1.20±0.10
φ3.60±0.10
2.80±0.10
R1.80
(17.10)
15.30±0.20
(3.80) (3.80)
22.00±0.30
The AN5765 is an IC for CRT heater voltage control.
The incorporation of 4 values of heater voltage changeover output circuit, 5 V power supply and reset circuit for
microcomputer, and the adoption of SIP 7-pin package
with fin can realize the rationalization and power saving
of the set.
1
(0.83)
2.54
(1.00)
0.60
7
(0.30) 1.45±0.20
±0.10
1.80±0.20
0.35 +0.10
–0.05
(1.20)
3.50±0.30
16.90±0.30
■ Applications
• CRT monitors
HSIP007-P-0000
■ Block Diagram
Regulator
voltage
Thermal
protect
Regulator
voltage
Switch
7
Heater output
6
5
Reset output
4
GND
3
5V
2
SW input
VCC
1
Reset
1
AN5765
ICs for TV
■ Pin Descriptions
Pin No.
Description
1
VCC
2
SW input
3
Regulator output (5 V)
4
GND
5
Reset output
6
Capacitor for delay
7
Heater output
Note) Fin has the same potential as GND
■ Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
VCC
12.0
V
ICC
2 000
mA
PD
1 400
mW
Topr
−20 to +75
°C
Tstg
−55 to +150
°C
Supply voltage
Supply current
Power dissipation
*2
Operating ambient temperature
Storage temperature
*1
*1
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
*2: The power dissipation shown is for the IC package at Ta = 75°C.
■ Recommended Operating Range
Parameter
Symbol
Range
Unit
Supply voltage
VCC
7.5 to 11.0
V
SW input
V2−4
0 to V3
V
Regulator output maximum output current
I3max
−400 to +0.1
mA
Heater output maximum output current
I7max
−1 000 to +0.05
mA
Note) '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.
■ Electrical Characteristics at Ta = 25°C
Parameter
Conditions
Min
Typ
Max
Unit
2
4.5
7
mA
VCC = 8 V, R3 = 1 kΩ, R7 = 500 Ω
1.7
2.0
2.3
V
V3−4
VCC = 8 V, R3 = 1 kΩ, R7 = 500 Ω
4.75
5.0
5.15
V
V5−4
VCC = 8 V, R3 = 1 kΩ, R7 = 500 Ω
4.75
5.0
5.15
V
V7−4
VCC = 8 V, R3 = 1 kΩ, R7 = 500 Ω
4.25
4.5
4.75
V
0

0.1
V
ICC
VCC = 8 V, load (R3, R7) open
Circuit voltage pin 2
V2−4
Circuit voltage pin 3
Circuit voltage pin 5
Circuit voltage pin 7
Heater output off voltage
2
Symbol
Circuit current pin 1
V7−4OFF VCC = 8 V, V2 = 0 V,
R3 = 1 kΩ, R7 = 500 Ω
ICs for TV
AN5765
■ Electrical Characteristics at Ta = 25°C (continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Regulator output voltage
V3RL
VCC = 8 V, R3 = 20 Ω, R7 = 10 Ω
4.7
5.0
5.1
V
Heater output voltage high
V7HI
VCC = 8 V, V2 = 5 V,
R3 = 20 Ω, R7 = 10 Ω
6.15
6.40
6.65
V
Heater output voltage mid.
V7MID
VCC = 8 V, V2 = 3 V,
R3 = 20 Ω, R7 = 10 Ω
4.95
5.2
5.45
V
Heater output voltage low
V7LO
VCC = 8 V, V2 = 2 V,
R3 = 20 Ω, R7 = 10 Ω
4.25
4.5
4.75
V
Heater output voltage off
V7OFF
VCC = 8 V, V2 = 0 V,
R3 = 20 Ω, R7 = 10 Ω
0

0.1
V
Delay capacitor discharge current
I6C
VCC = 5.0 V, V6 = 1 V
1
5

mA
Delay capacitor charge current
I6D
VCC = 6.0 V, V6 = 1 V
−15
−8.5
−4
µA
Reset output voltage low
V5LO
VCC = 8 V, V6 = 3.3 V
0

0.15
V
Reset output voltage high
V5HI
VCC = 8 V, V6 = 4.5 V
4.7
5.0
5.1
V
• Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Heater output operation start
supply voltage
VOP7
VCC voltage at which V7 becomes 0 V
to 4.5 V.
6.1
6.35
6.5
V
Delay capacitor charge start
regulator voltage
VOP3
Regulator voltage at which pin 6
becomes low to high.
4.4
4.6
4.8
V
Delay capacitor discharge start
regulator voltage
VOF3
Regulator voltage at which pin 6
becomes high to low.
3.9
4.1
4.3
V
Reset output operation stop
regulator voltage
VOFF3
Regulator voltage at which pin 5
becomes high to low.
3.9
4.1
4.3
V
■ Terminal Equivalent Circuits
Pin No.
Equivalent circuit
Description
VCC:
Power supply pin
DC 8 V (typ.) application
1
VCC
1
2
VCC
3
30 kΩ
2
200 Ω
SW input:
SW input pin for changing over heater output (pin 7)
voltage
Changeover from DC 0 V to 5 V
20 kΩ
3
AN5765
ICs for TV
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
3
Description
Regulator output:
5 V constant voltage output
DC 5 V
VCC
3
10 kΩ
4
GND:
GND (grounding) pin
Fin is also in the same potential.
0V
4
5
VCC
3
10 kΩ
5
200 Ω
Reset output:
Pin for reset output
Pin voltage becomes high at regulator output (pin 3) 4.6 V
or more.
5V
0V
6
VCC
5V
8.5 µA
6
Capacitor for delay:
Capacitor pin for reset output delay
Approx. 50 ms delay with C = 0.1µF connection
5V
200 Ω
0V
7
VCC
7
4
50 ms
Heater output:
Constant voltage output pin for heater
Voltage can be changed over by SW input (pin 2).
DC Pin 2
Pin 7
5 V  6.5 V
3 V  5.2 V
2 V  4.5 V
0V  0V
ICs for TV
AN5765
■ Technical Information
1. PD  Ta curves of HSIP007-P-0000
PD  T a
35.000
31.250
30.000
Power dissipation PD (W)
Infinite heat sink
Rth (j-c) = 4.0°C/W
25.000
20.000
15.000
10.000
5.000
Independent IC
without a heat sink
Rth (j-a) = 53.2°C/W
2.350
0.000
0
25
50
75
100
150
125
Ambient temperature Ta (°C)
2. Main characteristics
1) Heater output voltage control characteristic
(typical value)
2) Supply voltage characteristics (typical value)
V7
6.45
Each output voltage (V)
Heater output voltage V7 (V)
(Pin 3−pin 2, short)
5.2
4.5
6.45
V3
5
V5
0
0
0
1
2
3
4
0
5
2
4
6
8
10
VCC voltage V1 (V)
SW input voltage V2 (V)
3) Timing relationship of regulator output voltage vs. reset output
4.6 V
4.1 V
Pin 3
Pin 6
tdelay
Pin 5
Time
5
AN5765
ICs for TV
■ Technical Information (continued)
3. Operational explanation
1) Temperature protection circuit is built in.
The circuit operates at approx. 150°C (typ.) and
pin 7 output becomes low-level (0 V).
If the temperature falls due to the output current
decrease, the protection circuit turns off and pin 7 returns to the high-level again.
2) Pin 3 and pin 7 are equipped with current limiter circuit.
The limiter circuit operates at;
I3 ≤ −400 mA
I7 ≤ −1 000 mA
The current value is not guaranteed value since
the value fluctuates due to dispersion and temperature
characteristic.
V7
6.45 V
0V
V3
V7
5V
6.45 V
0V
−400 mA
I3
0V
150°C
Tj
−1 000 mA
I7
3) Pin 2 (SW input) is internally biased.
Pin 2 is biased at approx. 2 V when open. Pin 2 can be biased at approx. 3 V if 22 kΩ resistor is connected
between pin 2 and pin 3 (5 V). However, take sufficient care to its absolute value fluctuation since the built-in
resistor of IC has its dispersion and temperature dependency.
IC inside
To microcomputer
22 kΩ
5V 3
3V 2
30 kΩ
20 kΩ
Open
4) The Reset output becomes Low (0.15 V or less) by pin 3 voltage (at V3 ≤ 4.1 V).
If VCC is turned off prior to regulator output, regulator output once becomes high (0.7 V) at a voltage of 0.7
V or less but there is no problem in terms of characteristics.
VCC (pin 1)
VCC (pin 1)
Regulator (pin 3)
Regulator (pin 3)
Reset (pin 5)
Reset (pin 5)
0.7 V
0V
0V
(When pin 3 turns off first)
6
(When VCC turns off first)
ICs for TV
AN5765
■ Application Example
1. Application system example
VDD
Microcomputer
Heater
AN5765
Reset
SW
H−DY
AN5764
Horizontal position
adjustment
Horizontal drive
2. Application circuit example
Regulator
voltage
Thermal
protect
Regulator
voltage
Switch
100 µF
0.1 µF
7
6
5
3
2
3 1
GND 4
8V
VCC 1
Reset
0.1 µF
Heater
10 µF
2
Open
SW
7