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Ordering number : EN5209
Wide-Bandwidth Output Module (video pack)
VPS10
CRT Display Video Output Amplifier: High-Voltage, Wideband Amplification
Features
* High output voltage and wide bandwidth make the VPS10 optimal for use in f H (horizontal deflection frequency) = 85 kHz class color monitors. (f = 100 MHz -3 dB at VOUT = 50 Vp-p) * SIP molded 15-pin package with three channels in a single package.
Package Dimensions
unit: mm 2127
[VPS10]
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Allowable power dissipation Junction temperature Case temperature Storage temperature Symbol VCC max VBB max Pd max Tj max Tc max Tstg Tc = 25C with an ideal heat sink Conditions Ratings 120 15 25 150 100 -20 to +110 Unit V V W C C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage I Symbol VCC VBB VCC VBB Conditions Ratings 80 10 90 10 Unit V V V V
Recommended supply voltage II
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VPS10 Electrical Characteristics at Ta = 25C (for a single channel)
Parameter Frequency band I (-3 dB) Frequency band II Pulse response characteristics Voltage gain Symbol fc tc tr tf GV (DC) ICC1 Current drain I ICC2 ICC1 Current drain II ICC2 VCC = 80 V, VBB = 10 V, CL = 10 pF, VIN (DC) = 2.5 V, VOUT (p-p) = 40 V, f = 10 MHz clock VCC = 80 V, VBB = 10 V, CL = 10 pF, VIN (DC) = 2.5 V, VOUT (p-p) = 40 V, f = 100 MHz clock VCC = 90 V, VBB = 10 V, CL = 10 pF, VIN (DC) = 2.8 V, VOUT (p-p) = 50 V, f = 10 MHz clock VCC = 90 V, VBB = 10 V, CL = 10 pF, VIN (DC) = 2.8 V, VOUT (p-p) = 50 V, f = 100 MHz clock Conditions VCC = 80 V, VBB = 10 V, CL = 10 pF, VIN (DC) = 2.7 V, VOUT (p-p) = 40 V VCC = 90 V, VBB = 10 V, CL = 10 pF, VIN (DC) = 3.0 V, VOUT (p-p) = 50 V VCC = 80 V, VBB = 10 V, CL = 10 pF, VIN (DC) = 2.7 V, VOUT (p-p) = 40 V 17 Ratings min typ 100 100 5.0 3.5 19 43 60 50 75 21 max Unit MHz MHz ns ns times mA mA mA mA
Internal Equivalent Circuit
Test Circuit (for a single channel)
No. 5209-2/4
VPS10
Thermal Design Since the VPS10 includes three channels as shown in the internal equivalent circuit diagram, we first consider a single channel. The chip temperature of each transistor under actual operating conditions is determined using the following formula. Tj (TRi) = j-c (TRi) x PC (TRi) + Tc + Ta (C) ........................... (1) j-c (Tri): Thermal resistance of an individual transistor PC (Tri): Collector loss for an individual transistor Tc: Case temperature rise Ta: Ambient temperature The j-c (Tri) for each chip is: j-c (TR1) to (TR4) = 30C/W.......................................................... (2) Although the loss for each transistor in a video pack varies with frequency and is not uniform, if we assume operation at the maximum operating frequency, f = 100 MHz (clock), then the chips with the largest loss will be the emitter-follower stage transistors (TR3 and TR4) and that loss will be about 20% of the total loss. Thus from the Pd (shown in the figure) for a single channel we have: PC (E and F stages)f = 100 MHz = Pd (1ch)f = 100 MHz x 0.20 [W] ......... (3) Here, we must select a heat sink with a capacity h such that the Tj of these transistors does not exceed 150C. Equation (4) below gives the relationship between h and Tc. Tc = Pd (TOTAL) x h................................................................... (4) The required h is calculated using this equation and equation (1).
No. 5209-3/4
VPS10 VPS10 Thermal Design Example Conditions: Using an fH = 85 kHz class monitor, fV = 100 MHz (clock) VCC = 90 V, VBB = 10 V, VOUT = 50 Vp-p (CL = 10 pF) Consider the case where the maximum clock frequency is 100 MHz, taking into account the fact that this class of monitor can be operated at ambient temperatures up to Ta = 60C. As mentioned previously, the chips with the largest loss are the transistors in the emitter-follower stage. Determining those values gives: PC (E and F stages) = 7.2 x 0.20 = 1.44 [W]..................................... (5) We determine Tj by substituting the value for j-c in equation (5). Tj = 1.44 x 30 = 43.2 [C] Therefore, Tj (max) will be 43.2 + Tc (max) = 43.2 + 100. Since this will be under 100C, it suffices to design a heat sink that guarantees that Tc will be under 100C. Therefore, a heat sink such that Tc < 100C will have the following thermal resistance: h = Tc / Pd (TOTAL) = (Tc - Ta) / [Pd (1ch) x 3] = 40 / (7.2 x 3) = 1.85C/W Thus the thermal resistance in this case is h = 1.8C/W. In actual practice, the ambient temperature and operating conditions will allow a heat sink smaller than that indicated by this calculation to be used. Therefore, design optimization taking the actual conditions into account is also required.
Item 1 2
VCC (V) 90 80
VBB (V) 10 10
VOUT (V) 50 40
VO (center) 50 45
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of December, 1997. Specifications and information herein are subject to change without notice. No. 5209-4/4

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