VHK75W CUI | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 9
Technical content
rev. page date page date DESCRIPTION: chassis mount dc-dc converter 1 of 9 PART NUMBER: VHK75W
features
- 50-75W isolated output
- Efficiency to 85%
- RoHS Compliant
- 4:1 input range
- Regulated output
- Continuous short circuit protection
- Metal enclosure with integrated heatsink
- Rugged design
- Over-temperature shutdown
description
The VHK75W series of rugged DC-DC converters are designed for high reliability applications, featuring integral heat sink, over-temperature protection, over-current protection and input transient voltage protection. With an external input fuse, the converter can protect accidental input polarity reversal. The wide 4:1 input range (9-36V or 18- 75V) is very useful to stabilize an input source like batteries in various discharging and charging conditions. Additionally, high efficiency, fast response, tight regulations, remote sense and remote On/Off control make these converters very useful in many industrial and communications applications. MODEL input voltage output output input current efficiency nominal range voltage current 1 no load full load typ. (V dc) (V dc) (V dc) (A) (mA) (mA) (%) VHK75W-Q24-S3R3 24 9.0~36.0 3.3 15 50 2611 79 VHK75W-Q24-S5 24 9.0~36.0 5 15 50 3811 82 VHK75W-Q24-S12 24 9.0~36.0 12 6.25 50 3765 83 VHK75W-Q24-S15 24 9.0~36.0 15 5 50 3720 84 VHK75W-Q24-S24 24 9.0~36.0 24 3.12 50 3720 84 VHK75W-Q48-S3R3 48 18.0~75.0 3.3 15 50 1289 80 VHK75W-Q48-S5 48 18.0~75.0 5 15 50 1883 83 VHK75W-Q48-S12 48 18.0~75.0 12 6.25 50 1860 84 VHK75W-Q48-S15 48 18.0~75.0 15 5 50 1838 85 VHK75W-Q48-S24 48 18.0~75.0 24 3.12 50 1835 85 notes: 1. see output derating curve (page 4) *V-Infinity reserves the right to make changes to its products or to discontinue any product or service without notice, and to advise customers to verify the most up-to- date product information before placing orders. V-Infinity assumes no liability or responsibility for customer’s applications u sing V-Infinity products other than repair or replacing (at V-I’s option) V-Infinity products not meeting V-I’s published specifications. Nothing will be covered outside of standard product warranty. INPUT parameter conditions/description min nom max units input voltage range 9 24 36 V dc 18 48 75 V dc under voltage lockout 24 Vin power up 8.8 V dc
24 Vin power down 8 V dc
48 Vin power up 17 V dc
48 Vin power down 16 V dc
remote on/off control 2 section 15 in the application notes input filter PI type notes: 2. add suffix “N” to the model number for negative logic on/off control
DESCRIPTION: chassis mount dc-dc converter 2 of 9 PART NUMBER: VHK75W OUTPUT parameter conditions/description min nom max units voltage accuracy ±1 % transient response 25% step load change 500 μ sec external trim adj. range ±10 % ripple & noise (20MHz BW) 3.3V, 5V 40 mV RMS 100 mV pk-pk 12V& 15V 60 mV RMS 150 mV pk-pk 24V 100 mV RMS 240 mV pk-pk temperature coefficient ±0.03 %/°C short circuit protection continuous line regulation 3 ±0.2 % load regulation 4 ±0.2 % over voltage protection trip range, % Vo nom. 115 140 % over current protection nominal output 110 160 % GENERAL SPECIFICATIONS parameter conditions/description min nom max units switching frequency 300 KHz operating ambient temp. 5 -40 85 °C storage temperature -55 105 °C thermal shutdown case temp. 85 °C case material aluminum / steel ISOLATION SPECIFICATIONS parameter conditions/description min nom max units isolation voltage input/output 1500 V dc input/case 1500 V dc output/case 1500 V dc isolation resistance 100 M Ω notes: 3. measured from high line to low line at full load 4. measured from full load to zero load at nominal input 5. see output derating curve (page 4) *V-Infinity reserves the right to make changes to its products or to discontinue any product or service without notice, and to advise customers to verify the most up-to- date product information before placing orders. V-Infinity assumes no liability or responsibility for customer’s applications u sing V-Infinity products other than repair or replacing (at V-I’s option) V-Infinity products not meeting V-I’s published specifications. Nothing will be covered outside of standard product warranty.
26.18 1.031 9.7 0.380 (TYP) REV. DESCRIPTION DATE A NEW DRAWING 4/22/2008 SPECIFIED TOLERANCE: ±0.3mm UNLESS OTHERWISE Material A Website: www.cui.com RoHS Terminal # + V in - V in Remote Case + V out + S Trim - S - V out 20050 SW 112th Ave. Tualatin, OR 97062 Phone: 503-612-2300 800-275-4899 Fax: 503-612-2383 Aluminum/SteelCOPYRIGHT 2008 BY CUI INC. 1:2 VHKXXW Series SCALE: VHK DRAWN BY: TITLE: MM [INCHES] ZRJVHKXXW Series PC FILE NAME: APPROVED BY: UNITS:PART NO. REV: 38.00 1.496 0.630 (TYP) 4.006101.76 16.0 86.3 3.398 15 4 3 2 67 9 19.0 0.748 3.58391.0 (2 PLCS) (TYP) 9.7 0.382 70.0 2.756 108.0 4.252
the worst operating conditions. FIGURE 1. OUTPUT DERATING losses and voltage ripples are accounted for. One possible problem is driving the converter with a linear unregulated power su pply. sure the actual input voltage does not exceed the highest voltage of 36V or75V. for the input pair and the output pair, so as to minimize noise pickup.
source current is recommended to be: Ipeak = 150% * 75 / (82% * 9) = 15.24A . age, as shown in this equation: Ipeak = 150%*Pout/( ηη*Vmin) . suitable for this application. Make sure the fuse voltage rating is higher than the maximum input voltage. conduct a large amount of current that may trip the input fuse. Without the input fuse, the converter may suffer permanent dam ages. When the fuse is open, replace it with one of same type and ratings.
- INPUT REVERSAL PROTECTION
drop which is no more than 1V. With an external input fuse connected, the fuse will open and thus remove power from the conver ter. type and rating. Without the input fuse, the converter may suffer permanent damages. desired regulation points to the remote sense terminals, as shown below. FIGURE 2. REMOTE SENSE
- OUTPUT NOISE MEASUREMENT SCHEMATIC
scope bandwidth to 20MHz. Probe directly off of one of the capacitors, using a small ground clip to minimize measurement error . FIGURE 11. OUTPUT NOISE MEASUREMENT CIRCUIT