STV9325 ® Vertical Deflection Booster for 2.5-APPTV/Monitor Applications with 70-V Flyback Generator DATASHEET Main Features ■ Power Amplifier HEPTAWATT (Plastic Package) ORDER CODE: STV9325 ■ Flyback Generator ■ Stand-by Control ■ Output Current up to 2.5 App ■ Thermal Protection Description This device, supplied with up to 35 V, provides up to 2.5 App output current to drive the vertical deflection yoke. The internal flyback generator delivers flyback voltages up to 75 V. Input (Non Inverting) Output Stage Supply Output Ground Or Negative Supply Flyback Generator Supply Voltage Input (Inverting) 7 6 5 4 3 2 1 The STV9325 is a vertical deflection booster designed for TV and monitor applications. Tab connected to pin 4 In double-supply applications, a stand-by state will be reached by stopping the (+) supply alone. Non-Inverting Input Output Stage Supply Flyback Generator 6 3 2 Flyback Generator 7 + Power Amplifier Inverting Input 5 - 1 Thermal Protection STV9325 4 Ground or Negative Supply June 2004 Supply Voltage Revision 1.5 Output Absolute Maximum Ratings 1 STV9325 Absolute Maximum Ratings Symbol Parameter Value Unit Supply Voltage (pin 2) - Note 1 and Note 2 40 V Flyback Peak Voltage - Note 2 75 V -0.4 to (VS + 3) V - 0.4 to (VS + 2) or +40 V Voltage VS V5, V 6 V3 V1, V 7 Voltage at Pin 3 - Note 2, Note 3 and Note 6 Amplifier Input Voltage - Note 2, Note 6 and Note 7 Current I0 (1) Output Peak Current at f = 50 to 200 Hz, t ≤ 10µs - Note 4 ±5 A I0 (2) Output Peak Current non-repetitive - Note 5 ±2 A Sink Current, t<1ms - Note 3 2 A Source Current, t < 1ms 2 A Flyback pulse current at f=50 to 200 Hz, t≤10µs - Note 4 ±5 A ESD1 Human body model (100 pF discharged through 1.5 kΩ) 2 kV ESD2 EIAJ Standard (200 pF discharged through 0 Ω) 300 V I3 Sink I3 Source I3 ESD Susceptibility Temperature Ts Storage Temperature -40 to 150 °C Tj Junction Temperature +150 °C Note:1. Usually the flyback voltage is slightly more than 2 x V S. This must be taken into consideration when setting VS. 2. Versus pin 4 3. V3 is higher than V S during the first half of the flyback pulse. 4. Such repetitive output peak currents are usually observed just before and after the flyback pulse. 5. This non-repetitive output peak current can be observed, for example, during the Switch-On/SwitchOff phases. This peak current is acceptable providing the SOA is respected (Figure 8 and Figure 9). 6. All pins have a reverse diode towards pin 4, these diodes should never be forward-biased. 7. Input voltages must not exceed the lower value of either VS + 2 or 40 volts. 2 Thermal Data Symbol RthJC 2/14 Parameter Junction-to-Case Thermal Resistance Value Unit 3 °C/W TT Temperature for Thermal Shutdown 150 °C TJ Recommended Max. Junction Temperature 120 °C STV9325 3 Electrical Characteristics Electrical Characteristics (V S = 34 V, TAMB = 25°C, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit Fig. 35 V 5 20 mA 1 19 50 mA 1 1 Supply VS Operating Supply Voltage Range (V2-V4) Note 8 10 I2 Pin 2 Quiescent Current I3 = 0, I5 = 0 I6 Pin 6 Quiescent Current I3 = 0, I5 = 0, V6 =35v I1 Input Bias Current V1 = 1 V, V7 = 2.2 V - 0.6 -1.5 µA I7 Input Bias Current V1 = 2.2 V, V7 = 1 V - 0.6 -1.5 µA VS - 2 V 8 Input VIR Operating Input Voltage Range VI0 Offset Voltage 2 mV Offset Drift versus Temperature 10 µV/°C ∆VI0/dt 0 Output Operating Peak Output Current 0o<Tcase<125oC V5L Output Saturation Voltage to pin 4 I5 = 1.25 A V5H Output Saturation Voltage to pin 6 I5 = -1.25 A Output Voltage in Stand-by V1 = V7 = VS = 0 See Note 9 I0 ±1.25 A 0.9 1.6 V 3 1.5 2.2 V 2 Stand-by V5STBY VS - 2 V 80 dB Miscellaneous G Voltage Gain VD5-6 Diode Forward Voltage Between pins 5-6 I5 = 1.25 A 1.5 2.1 V VD3-2 Diode Forward Voltage between pins 3-2 I3 = 1.25 A 1.5 2.1 V V3SL Saturation Voltage on pin 3 I3 = 20 mA 0.4 1 V V3SH Saturation Voltage to pin 2 (2nd part of flyback) I3 = -1.25 A 1.8 2.6 V 3 8. In normal applications, the peak flyback voltage is slightly greater than 2 x (VS - V 4). Therefore, (VS - V 4) = 35 V is not allowed without special circuitry. 9. Refer to Figure 4, Stand-by condition. 3/14 Electrical Characteristics STV9325 Figure 1: Measurement of I 1, I2 and I6 +Vs I2 I6 6 2 5 7 2.2V 39kΩ STV9325 (a) S 1 (b) 4 I1 (a): I2 and I6 measurement 5.6kΩ 1V (b): I1 measurement Figure 2: Measurement of V5H +Vs 6 2 V5H 7 2.2V 5 STV9325 1 - I5 1V 4 Figure 3: Measurement of V3L and V5L +Vs I3 or I5 6 2 (b) 7 (a) 3 1V STV9325 5 1 2.2V V3L 4 (a): V5L measurement (b): V 3L measurement 4/14 V5L STV9325 4 Application Hints Application Hints The yoke can be coupled either in AC or DC. 4.1 DC-coupled Application When DC coupled (see Figure 4), the display vertical position can be adjusted with input bias. On the other hand, 2 supply sources (VS and -VEE ) are required. A Stand-by state will be reached by switching OFF the positive supply alone. In this state, where both inputs are the same voltage as pin 2 or higher, the output will sink negligible current from the deviation coil. Figure 4: DC-coupled Application +Vs 0 0 0 0 0 0 0 0 0 00.1µF 3 6 Vertical Position Adjustment 00000 00000 Output Current Flyback Generator Ip Power Amplifier 7 + 5 1 VM 2 R3 - Thermal Safety 1.5Ω Vm -VEE 4 470µF (*) recommended: 4.1.1 Rd(*) Yoke Ly 0.22µF Vref Output Voltage CF (47 to 100µF) 470µF 00 00 00 00 00 00 00 00 00 0.1µF Ly Ly ------------- < Rd < ------------20µs 50µs R2 00 00 00 00 00 R1 Application Hints For calculations, treat the IC as an op-amp, where the feedback loop maintains V 1 = V7. 5/14 Application Hints STV9325 4.1.1.1 Centering Display will be centered (null mean current in yoke) when voltage on pin 7 is (R1 is negligible): VM + Vm ⎛ R 2 ⎞ V 7 = ------------------------ × ⎜ ----------------------⎟ 2 ⎝ R 2 + R 3⎠ 4.1.1.2 Peak Current ( VM – Vm ) R2 I P = ----------------------------- × ------------------R 1 xR 3 2 Example: for V m = 2 V, VM = 5 V and IP = 1 A Choose R1 in the1 Ω range, for instance R1=1 Ω 2 × IP × R1 2 - = --------- = ---------------------------3 R V –V 3 M m R2 From equation of peak current: Then choose R2 or R3. For instance, if R2 = 10 kΩ, then R3 = 15 kΩ Finally, the bias voltage on pin 7 should be: V +V 7 1 M m 1 V 7 = ------------------------ × ----------------- = ---- × -------- = 1.4V 2 2.5 R 2 3 1 + ------R2 4.1.2 Ripple Rejection When both ramp signal and bias are provided by the same driver IC, you can gain natural rejection of any ripple caused by a voltage drop in the ground (see Figure 5), if you manage to apply the same fraction of ripple voltage to both booster inputs. For that purpose, arrange an intermediate point in the bias resistor bridge, such that (R8 / R7) = (R3 / R2), and connect the bias filtering capacitor between the intermediate point and the local driver ground. Of course, R7 should be connected to the booster reference point, which is the ground side of R1. Figure 5: Ripple Rejection 6 3 2 Flyback Generator Reference Voltage Power Amplifier 7 R9 R8 0000 0000 + 5 R7 1 - Thermal Safety Rd 4 Ramp Signal Driver Ground 6/14 R3 Source of Ripple 00 00 R2 R1 0000 Yoke Ly STV9325 4.2 Application Hints AC-Coupled Applications In AC-coupled applications (See Figure 6), only one supply (VS ) is needed. The vertical position of the scanning cannot be adjusted with input bias (for that purpose, usually some current is injected or sunk with a resistor in the low side of the yoke). Figure 6: AC-coupled Application 00000 00000 470µF +Vs CF (47 to 100µF) 0.1µF 6 3 Output Voltage 2 Output Current Flyback Generator Ip Power Amplifier 5 1 R3 VM Vm + - Thermal Safety 1.5Ω 00000 00000 4 R5 (*) recommended: 4.2.1 0000 C s Rd(*) Yoke Ly 0.22µF 00000 7 R4 CL R2 Ly Ly ------------- < Rd < ------------50µs 20µs 00000 R1 Application Hints Gain is defined as in the previous case: I R2 VM – Vm = ----------------------× ---------------------p 2 R ×R 1 3 Choose R1 then either R2 or R3. For good output centering, V 7 must fulfill the following equation: VS VM + Vm -------- – V V – ------------------------ V 7 7 7 2 2 ---------------------- = -------------------------------------- + ------R +R R R 4 5 3 2 or V M + V m⎞ VS ⎛ 1 1 1 V × ⎛ ------- + ------- + ---------------------- ⎞ = ⎜ ------------------------------ + ------------------------⎟ 7 ⎝R ⎠ R2 R + R 2 × R3 ⎠ ⎝ 2 (R 4 + R5 ) 3 4 5 7/14 Application Hints STV9325 CS performs an integration of the parabolic signal on CL, therefore the amount of S correction is set by the combination of CL and Cs. 4.3 Application with Differential-output Drivers Certain driver ICs provide the ramp signal in differential form, as two current sources i + and i− with opposite variations. Figure 7: Using a Differential-output Driver +Vs 00000 00000 470µF Output Voltage CF (47 to 100µF) 0.1µF 6 3 2 Output Current Flyback Generator Differential output driver IC Ip Power Amplifier ip icm + 7 + 5 R7 -ip icm 1 - Thermal Safety 1.5Ω - -VEE 4 470µF (*) recommended: Rd(*) 0.22µF 00000 00 00 00 00 00 00 00 00 00 00 Yoke Ly 0.1µF R2 00 00 00 00 00 Ly Ly -------------- < Rd < -------------20 µs 50µs R1 Let us set some definitions: 1 i cm = --- ( i + + i - ) 2 ● icm is the common-mode current: ● at peak of signal, i+ = icm + ip and i− = icm - ip, therefore the peak differential signal is ip - (ip) = 2 ip, and the peak-peak differential signal, 4ip. The application is described in Figure 7 with DC yoke coupling. The calculations still rely on the fact that V1 remains equal to V7. 8/14 STV9325 4.3.1 Application Hints Centring When idle, both driver outputs provide icm and the yoke current should be null (R1 is negligible), hence: i cm ⋅ R 7 = i cm ⋅ R 2 therefore R 7 = R 2 4.3.2 Peak Current Scanning current should be IP when positive and negative driver outputs provide respectively icm - ip and icm + ip, therefore (i cm – i ) ⋅ R 7 = I p ⋅ R 1 + ( i cm + i ) ⋅ R 2 and since R7 = R2: 2R 7 Ip ----- = – ----------R1 i Choose R1 in the 1Ω range, the value of R2 = R7 follows. Remember that i is one-quarter of driver peak-peak differential signal! Also check that the voltages on the driver outputs remain inside allowed range. ● Example: for icm = 0.4mA, i = 0.2mA (corresponding to 0.8mA of peak-peak differential current), Ip = 1A Choose R1 = 0.75Ω, it follows R2 = R7 = 1.875kΩ. 4.3.3 Ripple Rejection Make sure to connect R7 directly to the ground side of R1. 4.3.4 Secondary Breakdown Diagrams Figure 8: Output Transistor Safe Operating Area (SOA) for Secondary Breakdown The diagram has been arbitrarily limited to max I0 (2 A). 9/14 Mounting Instructions STV9325 Figure 9: Secondary Breakdown Temperature Derating Curve (ISB = Secondary Breakdown Current) 5 Mounting Instructions The power dissipated in the circuit is removed by adding an external heatsink. With the HEPTAWATT™ package, the heatsink is simply attached with a screw or a compression spring (clip). A layer of silicon grease inserted between heatsink and package optimizes thermal contact. In DCcoupled applications we recommend to use a silicone tape between the device tab and the heatsink to electrically isolate the tab. Figure 10: Mounting Examples 10/14 STV9325 6 Pin Configuration Pin Configuration Figure 11: Pins 1 and 7 2 7 1 Figure 12: Pin 3 & Pins 5 and 6 6 2 2 5 3 4 11/14 Package Mechanical Data 7 STV9325 Package Mechanical Data Figure 13: 7-pin Heptawatt Package L E L1 M1 A M D C D1 H2 L2 L5 L3 F E E1 V4 L9 H3 G G1 G2 Dia. F L10 H2 L4 L11 L7 L6 Table 1: Heptawatt Package mm inches Dim. Min. Typ. Min. Typ. Max. A 4.8 0.189 C 1.37 0.054 D 2.40 2.80 0.094 0.110 D1 1.20 1.35 0.047 0.053 E 0.35 0.55 0.014 0.022 E1 0.70 0.97 0.028 0.038 F 0.60 0.80 0.024 0.031 G 2.34 2.54 2.74 0.095 0.100 0.105 G1 4.88 5.08 5.28 0.193 0.200 0.205 G2 7.42 7.62 7.82 0.295 0.300 0.307 H2 12/14 Max. 10.40 H3 10.05 L 16.70 16.90 0.409 10.40 0.396 17.10 0.657 0.409 0.668 0.673 STV9325 Package Mechanical Data Table 1: Heptawatt Package (Continued) mm inches Dim. Min. Typ. Max. Min. Typ. L2 21.24 21.54 21.84 0.386 0.848 0.860 L3 22.27 22.52 22.77 0.877 0.891 0.896 L5 2.60 2.80 3.00 0.102 0.110 0.118 L6 15.10 15.50 15.80 0.594 0.610 0.622 L7 6.00 6.35 6.60 0.0236 0.250 0.260 L1 14.92 L4 0.587 1.29 L9 Max. 0.051 0.20 0.008 L10 2.10 2.70 0.082 0.106 L11 4.30 4.80 0.169 0.190 M 2.55 2.80 3.05 0.100 0.110 0.120 M1 4.83 5.08 5.33 0.190 0.200 0.210 V4 Dia. 40 (Typ.) 3.65 3.85 0.144 0.152 13/14 Revision History 8 STV9325 Revision History Table 2: Summary of Modifications Version Date Description 1.0 April 2003 First Issue. 1.1 April 2003 Correction to Section 4.1.1.2: Peak Current. Creation of new title, Section 4.3.4: Secondary Breakdown Diagrams. 1.2 November 2003 Datasheet status changed to preliminary data. 1.3 December 2003 Modification to Figure 11. 1.4 April 2004 Flyback voltage value changed on page 1. 1.5 June 2004 Datasheet status changed to datasheet. Information furnished is believed to be accurate and reliable. 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