“A” SERIES

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“A” SERIES

HIGH VOLTAGE POWER SUPPLY

8 models from 0 to 62V through 0 to 6kV

4, 20, or 30 watts of output power

Maximum Iout capability down to 0 Volts

Wide input voltage range

Available with Ripple Stripper® Filter

Indefinite output short-circuit protection

Output current monitor

Fixed-frequency, low-stored-energy design

>430,000 hour MTBF @65°C

UL, cUL, IEC-60950-1, and Demko Recognized

GENERAL INFORMATION:
The “A” Series of high-voltage, regulated DC-DC converters addresses the needs of the miniature-PCB-mount-regulated- high-voltage-power-supply user. Designed and built utilizing state-of-the-art power conversion topology, these units feature surface mount technology and encapsulation techniques providing high reliability and low cost.

DESIGN METHODOLOGY:
The “A” converters utilize a dual-ended forward converter topology with a nominal switch frequency of <100kHz. A precision reference is provided so the remote control can program the power supply for a specific voltage. Once input voltage stabilizes, under-voltage lockout is released. As soon as enable is raised above a TTL 1, the converter begins to switch. The soft-start circuit brings the converter to full power over a 1mS period, reducing surges on the source supply. A constant-frequency PWM regulation system controls the MOSFET push-pull power stage, which drives the high voltage transformer. The power stage is protected from output current overloads or short circuits via a secondary current limit circuit. High voltage is developed by a multistage multiplier while feedback voltage is developed and sent to the CTRL circuit to maintain regulation. Internal filters are provided to reduce input current ripple and output voltage ripple.

WIDE INPUT RANGE:
The “A” Series is designed for full power operation at up to 90% efficiency. A wide input range of +11 to +16VDC or +23 to +30VDC will maintain full power output without derating. The derated input range is +9 to +32VDC. See Application Note 16 for protection information.

WIDE OUTPUT RANGE:
The “A” Series is a non-isolated, unipolar converter. Positive or negative output must be specified. Output voltage is adjustable from 0 to 62, 125, 250, 500, 1kV, 2kV, 4kV, or 6kV. As the output voltage is reduced towards 0, the maximum current capability remains unchanged.

OUTPUT VOLTAGE MONITOR:
The “A” Series features an output current monitor. Current from the high-voltage multiplier can be monitored by reading the voltage appearing between Output Monitor pin 3 and Signal Ground Return pin 5. Internal voltage dividers create a small linear offset voltage. See Application Note 13.

REMOTE CONTROL:
The “A” Series is remotely programmed with 0 to +5 VDC to produce an output voltage. Input may be from a control voltage, a DAC, or from a variable or fixed resistor. On a negative output converter the programming logic of the remote adjust would be inverted, i.e.: +5 to 0VDC. Connections are on the converter for the internal reference, analog remote adjust and the signal ground. The reference is +5.0VDC, temperature compensated with a 464Ω output impedance. See Figure E & F or Application Note 1 for more information.

STANDBY MODE:
The “A” converters also have an enable function. When the enable is TTL 0 (<+0.7V Isink=1mA) the converter is in a standby mode and input current is reduced to <30 mA. All functions other than the internal reference are shut down. If the enable pin is left unconnected, TTL 1, or at greater voltages up to +32VDC the converter operates normally. The open circuit output voltage from the Enable pin is <+5VDC. In the inhibit mode, 1 mA will have to be sunk for proper shutdown.

MECHANICAL:
“A” Series converters are in PCB mountable plastic cases requiring a footprint of 5.5 in² and only 4.3 in³ of volume. Mounting plates and brackets are available for chassis mounting. This Series is also available in an RF-tight metal PCB/chassis mount package. See Application Note 6 for thermal considerations and mounting configurations. All models are available with optional, six-sided, wrap-around Mu-Metal Shielding.

ENVIRONMENTAL:
The “A” Series provides full power operation at case temperatures from -40 to +65°C. All units receive a 24-hour burn-in prior to final testing. Extended temperature range is available along with other enhanced capabilities. Please contact the factory.

1800 OCEAN AVE., FRNT
RONKONKOMA, NY 11779

TEL 800-9HV-POWER
TEL 631-471-4444
FAX631-471-4696

www.ultravolt.com

Parameter

Conditions

Models

Units

Input:

12V

24V

Voltage Range

Full Power

+ 11 to 16

+ 23 to 30

VDC

Voltage Range

Derated Power Range

+ 9 to 32

VDC

Current

Standby / Disable

< 30

Current

No Load, Max Eout

< 100

< 90

Current

Max Load, Extended Input Voltage

Figures A & B

Graph

AC Ripple Current

Nominal Input, Full Load

< 80

mA p-p

Output:

1/16A

1/8A

1/4A

1/2A

Voltage Range

Nominal Input

0 to 62

0 to 125

0 to 250

0 to 500

0 to 1,000

0 to 2,000

0 to 4,000

0 to 6,000

VDC

Nominal Input Voltage / Model

VDC

Power

Nominal Input, Max Eout

Watts

Current

Iout Entire Output Voltage Range

320

480

160

240

120

7.5

0.67

3.3

Ripple

Full Load, Max Eout

.02

.03

.05

.013

.015

.016

.01

.04

.048

.001

.02

.017

.038

.071

.15

.01

.05

.065

.019

.057

.022

.0185

.073

.112

%V p-p

Ripple with –F-M Option

Full Load, Max Eout, 300pF bypass Cap

.002

.004

.006

.0048

.0056

.006

.0052

.0028

.005

.001

.0138

.0016

.0005

.0008

.002

.0007

.0038

.004

.0004

.0088

.0026

.0003

.0012

.004

%V p-p

Dynamic Load Regulation

½ to Full Load, Max Eout per .1mA

<.12

<.20

<.50

<1.0

<2.0

<4.0

<6.0

V pk

Voltage Derating

Max Iout, Extended Input Voltage

Figures C & D

Graph

Line Regulation

Nom. Input, Max Eout, Full Power

< 0.01 %

VDC

Static Load Regulation

No Load to Full Load, Max Eout

<0.01%

VDC

Stability

30 Min. warmup, per 8 hr/ per day

<0.01% / <0.02%

VDC

Remote Programming:

All Types

Input Impedance

Nominal Input

+ Output Models 1.1MΩ to GND, - Output Models 1.1MΩ to +5 Vref

MΩ

Adjust Resistance

Typical Potentiometer Values

10K to 100K (Pot across Vref. & Signal GND, Wiper to Adjust)

Adjust Linearity

0% to 100%

Figure E

Graph

Adjust Voltage

Referenced to signal ground

Figure E (0 to +5 VDC)

Graph

Adjust Logic

0 to +5 for +Out, +5 to 0 for -Out

+4.64 VDC for +Output or +0.36 for -Output = Nominal Eout

Reference:

All Types

Output Voltage

T=+25°C, Initial Value

+ 5.00 ± 2%

VDC

Output Impedance

T=+25°C

464 ± 1%

Stability

Over Full Temperature Range

Figure F

Graph

Enable:

All Types

Power Supply On

Floated, or voltage ≥ TTL High

+2.4 to 32

VDC

Power Supply Off

Grounded, or voltage ≤ TTL Low

0 to + 0.7 ± 0.2 (Isink 1mA minimum)

VDC

Temperature & Humidity:

Standard

-25PPM

Humidity

All Conditions, Standard Package

0 to 95% non-condensing

Operating

Full Load, Max Eout, Case Temp.

-40 to +65

+10 to +45

°C

Storage

Non-Operating, Case Temp.

-55 to +105

°C

Coefficient

Over the Specified Temperature

± 50

± 25

PPM/ °C

Thermal Shock

Mil-Std-810, Method 503-4, Proc. II

-40 to +65

°C

Altitude:

All Types

All Conditions

Standard Package

Sea Level through Vacuum

Shock & Vibration:

Standard

-C Option

Shock

Mil-Std-810, Method 516.5, Proc. IV

G's

Vibration

Mil-Std-810, Method 514.5, Fig. 514.5C-3

G's

Packaging:

Standard

-C Option

Material

Outer construction

Plastic (DAP) ASTM-D-5948

Aluminum Alloy 5052-H32, Finish: MIL-C-5541 Class 1A

Length

Not including pins or mounting pts

3.70 ± 0.050 (94.0)

4.75 ± 0.025 (120.7)

In (mm)

Width

Not including pins or mounting pts

1.50 ± 0.050 (38.1)

2.00 ± 0.025 (50.8)

In (mm)

Height

Not including pins or mounting pts

0.77 ± 0.050 (19.6)

1.00 ± 0.025 (25.4)

In (mm)

Volume

Not including pins or mounting pts

4.30 (70.5)

8.00 (131.1)

In³ (cc)

Weight

Overall

5.0 (142)

10.0 (284)

Oz (g)

Typical Performance Characteristics:
Fig. A DC Efficiency vs. Input Voltage Range	Fig. B Input Current vs. Input Voltage Range
Fig. C Output Voltage vs. 12V/4 Watt Extended Input Voltage (Up to 65°C Chassis Mount w/o Heatsink)	Fig. D Output Voltage vs. 24V/20 Watt Extended Input Voltage (Up to 65°C Chassis Mount w/o Heatsink)
Fig. E Remote Control Characteristics	Fig. F Reference Stability

PLASTIC CASE
CONSTRUCTION:
     Epoxy-filled DAP box
     certified to ASTM-D-5948
TOLERANCE:
     Overall ±0.050” (1.27)
     Pin to Pin ±0.015” (0.38)
     Mounting hole location ±0.025” (0.64)
MOUNTING:
     #2-56 x 0.30 (7.62)
     2 places threaded post
     may not be flush to cover
PINS:
     Gold-plated 0.025 (0.64) sq.
     The center of the pins and mounting holes
     is located from the center of pin 1
     Pins 1 thru 7 spacing 0.200 (5.08) on
     center, height from cover 0.470 (11.7) min
     Pins 8, 9, and 10, 11 spacing 0.100 (2.54)
     on center, height from cover 0.470 (11.7) min
NOTE:
     20W and 30W versions are an
     additional 0.062” (1.57) in height.
     -M equipped units are an
     additional 0.030” (0.76) in height.
     Contact UV customer service for
     drawings on models equipped with
     -E or -H options

METAL CASE
CONSTRUCTION:
     Aluminum box
     Chem film per MIL-C-5541
     Class 1A
TOLERANCE:
     Overall ±0.025” (0.64)
     Pin to Pin ±0.015” (0.38)
     Hole to Hole location ± 0.025” (0.64)

Connections

1 - Input-Power Ground Return

2 - Positive Power Input

3 - Iout Monitor

4 - Enable/Disable

5 - Signal Ground Return

6 - Remote Adjust Input

7 - +5VDC Reference Output

8 - HV Ground Return

9 - HV Ground Return or Eout Monitor (-Y5)

10 - HV Output

11 - HV Output

All grounds joined internally. Power-supply mounting points isolated from internal grounds by >100kΩ, .01uF / 50V (Max) on all models except -M, -C, and -M-E configurations which are 0Ω.

Ordering Information

Type:	0 to 62 VDC Output	1/16A
	0 to 125 VDC Output	1/8A
	0 to 250 VDC Output	1/4A
	0 to 500 VDC Output	1/2A
	0 to 1,000 VDC Output	1A
	0 to 2,000 VDC Output	2A
	0 to 4,000 VDC Output	4A
	0 to 6,000 VDC Output	6A
Input:	12VDC Nominal	12
	24VDC Nominal	24
Polarity:	Positive Output	-P
	Negative Output	-N
Power:	Watts Output (12 V Only)	4
	Watts Output (24 V Only)	20
	Watts Output (24 V Only)	30
Case:	Plastic Case - Diallyl Phthalate	STD
	‘Eared’ Chassis Mounting Plate	-E
	RF-Tight Aluminum Case	-C
Heat Sink:	.400” High (sized to fit case)	-H
Shield:	Six-sided Mu-Metal Shield	-M
Ripple Stripper®:	Integral Output Filter (see ”F” Series DS)	-F
Voltage Monitor:	Optional Eout Monitor	-Y5
Iout Monitor Boost:	Boosted Iout Monitor Signal Level	-Y10
Temp Coefficient:	25PPM Temperature Coefficient	-25PPM