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