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High Voltage Current Regulators
Preliminary Data Sheet The IXYS IXC series of high voltage current regulators consists of nonswitchable, 2-terminal, AC and DC current regulators.
IXC Series
VAK = 450 V IA(P) = 2 - 60 mA RDYN = 9 - 900 k
TO-220 AB (IXCP)
4 4 1 3 12
AC non-switchable regulators This family consists of two DC current regulators connected internally in series to regulate the current to a specified value in both directions. Its output characteristics in quadrants 1 and 3 are the same as shown in Figure 1 so that the current regulation is also the same in both directions. Parts are only available in the TO-220 package.
Current Regulator Nomenclature Parts can be ordered by using the following nomenclature: TO-252 AA (IXCY)
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Fig. 1. Current Regulator Output Characteristics Non-switchable regulators This is a family of extremely stable, high voltage current regulators with the typical output characteristic shown in Figure 1. The temperature stability is based on a threshold compensation technique and uses IXYS' most recently developed high voltage process. The complete family will be capable of providing other intermediate current levels which can be programmed on-chip during the manufacturing phase. Specific applications are current sourcing in PABX applications, telephone line terminations, surge protection and voltage supply protection. Two devices in a back-toback configuration will give bidirectional operation. Specific bidirectional applications would be series surge protection and soft startup applications from AC mains.
Features Extremely stable current characteristics (50 ppm/K) Minimum of 450 V breakdown Easily configured for bidirectional current sourcing 40 W continuous dissipation International standard packages JEDEC TO-220 and TO-252
IXCP10M45A IX C P Y 10 M 45
(Example) IXYS Current Regulator Package style TO-220 AB TO-252 (D-PAK)* Current Rating, 10 = 10 mA Current Level A = Amps, M = mA, U = A Voltage rating 45 = 450 V
Applications PABX current sources Telephone line terminations in PABXs and modems Highly stable voltage sources Surge limiters and voltage protection (DC and AC) Instantaneously reacting resetable fuses Waveform synthesizers Soft start-up circuits
Fig. 2. Block diagram for the non-switchable regulator
(c) 2004 IXYS All rights reserved
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DS98703A (7/04)
IXC Series Non-Switchable DC Current Regulators
Symbol VAK PD IRM TJ Tstg TL MD Definition Drain Source Voltage Power Dissipation (TC = 25C) IXC_02M to IXC_50M IXC_60M & IXC_100M Maximum Ratings 450 25 40 1 -55 to +150 -55 to +150 260 V W W A C C C TO-220 AB Outline
Maximum Reverse Current Junction Operating Temperature Storage Temperature Temperature for soldering (max. 10 s) Mounting torque with screw M3 (TO-220) with screw M3.5 (TO-220) Definition/Condition
0.45/4 Nm/lb.in. 0.55/5 Nm/lb.in.
Symbol
Characteristic Values (TJ = 25C, unless otherwise specified) min. typ. max. 450 1.9 9.0 18 36 45 56 88 VAK= 10 V 800 160 78 19 15 8 2.0 10 20 40 50 60 100 50 900 180 85 21 17 9 1.8 2.5 11.8 22 44 55 64 110 V mA mA mA mA mA mA mA ppm/K k k k k k k V
Dim. A A1 A2 b b1 b2 c c1 D D1 E E1 e e1 H L L1 L2 L3 Millimeter Min. Max. 2.19 2.38 0.89 1.14 0 0.13 0.64 0.89 0.76 1.14 5.21 5.46 0.46 0.58 0.46 0.58 5.97 6.22 4.32 5.21 6.35 6.73 4.32 5.21 2.28 BSC 4.57 BSC 9.40 10.42 0.51 1.02 0.64 1.02 0.89 1.27 2.54 2.92 Inches Min. Max. 0.086 0.035 0 0.025 0.030 0.205 0.018 0.018 0.235 0.170 0.250 0.170 0.090 0.180 0.370 0.020 0.025 0.035 0.100 0.094 0.045 0.005 0.035 0.045 0.215 0.023 0.023 0.245 0.205 0.265 0.205 BSC BSC 0.410 0.040 0.040 0.050 0.115
BVAK* IA(P)
Breakdown voltage: Plateau Current
__M45 ID = 1.5 IA(P) 02M__ VAK = 10 V 10M__ 20M__ 40M__ 50M__ 60M__ 100M__
TO-252 AA Outline
IA(P)/T VAK/ IA(p)
Plateau Current Shift with Temperature Dynamic Resistance
02M__ VAK = 10 V 10M__ 20M__ 50M__ 60M__ 100M__
VF RthJC RthJA
Diode forward voltage drop; IF = 50mA Thermal Resistance junction-to-case
IXC_02M to IXC_50M 5.0 K/W IXC_60M & IXC_100M 3.1 K/W Thermal Resistance junction-to-ambient TO-220 80 K/W TO-252 100 K/W
* Pulse test to limit power dissipation to within device capability.
Pin connections
1 = No connection 2, 4 = Positive terminal A 3 = Negative terminal K
Product Marking
TO-220 types - full part number TO-252 - last 7 alpha-numeric characters of the part number, e.g. CY02M45
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IXC Series Application Examples
DC and AC Overvoltage Suppression The regulator can be used as a voltage surge suppressor. The device is again connected in series with the lead (Fig. 5) and would normally operate at a current level lower than the plateau (Fig. 6a). Any incoming voltage surge (Fig. 6b) less than the breakdown voltage of the regulator will be clamped by the IXCP regulator to voltage less than the plateau current times the effective resistance of the load.
Fig. 5. DC surge suppression source of a highly stable current to produce a usable voltage reference (Fig. 7). This would be effectively independent of temperature and a low cost approach. A high voltage reference is also possible, thanks to their high breakdown voltages.
Fig.8. Low cost current regulators instead of fuses The obvious advantages to having this regulator as fuse substitute are: Prevents a "dip" in the power supply during a fault condition Regulator remains intact Can be easily tied in with logic to indicate a "down state" board
R = 100 R = 50 R = 25
Vout = 3.5 V nominal Vout = 1.75 V nominal Vout = 0.875 V nominal
Fig. 6a. DC surge suppression
Fig. 7. Simple voltage source with high stability Instantaneous "Fuse" Another application would be protection against sudden voltage droops on voltage supply lines to logic cards in computing systems, resulting from one component suddenly shorting to ground. Normal fusing networks will draw considerable current during the time it takes for the fuse to clear. This could cause a sufficient dip in power rail voltage to cause malfunctions of the other logic cards, even with fast-blow fuses (Fig. 8). The current regulator in series with the logic card restricts the current to its own operating level (Fig. 9). Therefore the voltage supply does not become overloaded and the regulator remains intact. The current regulator thus provides an "instantaneous fusing" function. When the logic component is replaced, the regulator resumes its normal functioning mode.
Fig. 6b. Incoming surge/output surge across load Soft Start-Up Circuits Here the regulator characteristic will clamp initial current surges which can occur when power is initially applied to a load. The device, with its 450 V capability could, for example, be used with a DC power supply or with AC mains to limit the initial high inrush of current into lamp filaments, thereby increasing the filament life several times. It could, therefore, be used effectively in lighting displays and in the transportation lighting industries. Highly Stable Voltage Sources Another obvious application would be to use the current regulator as a
IXYS MOSFETs and IGBTs are covered by 4,835,592 one or moreof the following U.S. patents: 4,850,072 4,881,106
Fig. 9. Normal fusing links in series with each board Testing & Handling Recommendations For initial assessment of the parts where the customer may test the device characteristics in free air without heat sinking, the continuous power dissipation should be kept within 1.5 W at ambient of 25C. (RthJA = 80 K/W for TO-220, and RthJA = 100 K/W for TO-252) Normal electrostatic handling precautions for MOS devices should be adhered to.
4,931,844 5,017,508 5,034,796
5,049,961 5,063,307 5,187,117
5,237,481 5,381,025 5,486,715
6,162,665 6,259,123 B1 6,306,728 B1
6,404,065 B1 6,534,343 6,583,505
6,683,344 6,710,405B2 6,710,463
6,727,585 6,759,692
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