CAH Series
Single, Dual, and Triple Output
Ultra Wide Input Voltage Range
Up to 40 Watts DC/DC Converter
Rev B
FEATURES
● Regulated Outputs
● Remote On/Off Control
● Industry Standard Pin-Out
● 500VDC Minimum I/O Isolation
● Redesigned for Higher Efficiency
● Ultra-Wide Input Voltage Range (4:1)
● Thermal Shutdown with Auto-Recovery
● Current Limiting Short Circuit Protection
● LC Input Filter for low Reflected Ripple Current
● Operating Temperature –40°C to +100°C Baseplate
DESCRIPTION
The CAH series of single, dual, and triple output dc/dc converters performs over an ultra-wide input voltage range (4:1),
providing indefinite short-circuit and over-voltage protection. The CAH series design technology allows for up to 40 watts
output power from a 3.0" x 3.0" x 0.55", or 3.6" x 3.0" x 0.55" with baseplate. These current mode control forward converters
are designed for improved transient response and reduced stress on switching components.
SPECIFICATIONS: CAH Series
All specifications apply @ 25°C ambient unless otherwise noted
INPUT SPECIFICATIONS
PROTECTION SPECIFICATIONS
Input Voltage Range .......5V nominal input .................4.5 - 9VDC
24V nominal input.................9 - 36VDC
Short Circuit Protection............................continuous, hiccup mode
Over Voltage Protection..............................................Zener Clamp
Current Limiting .....................................................Power Foldback
48V nominal input..............18 - 75 VDC
Input Filter................................................................ LC input filter
Remote On/Off Control .................................. Open Collector TTL
GENERAL SPECIFICATIONS
Efficiency ......................................................................85% typical
Switching Frequency ..................................................300kHz (typ)
Isolation Voltage (Input to Output) ............................500VDC (min)
Isolation Resistance (Input to Output)..................................500MΩ
OUTPUT SPECIFICATIONS
Output Voltage ................................................................see table
External Output Trim......................................±10% (primary only)
Voltage Tolerance.............................. ±1% primary, ±2% auxiliary
Output Current ................................................................see table
Output Power ..................................................................see table
Line Regulation .............................. ±0.5% primary, ±1% auxiliary
Load Regulation ......................... ±1% single outputs (see note 5)
Ripple/Noise (20MHz BW) ...........................1% Vout (see note 7)
Transient Response........................... < 200μs to within ±1% Vout
Temperature Coefficient.........................................0.02%/°C max.
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature (ambient) ....... -40°C to +100°C Baseplate
Storage Temperature............................................ -55°C to +100°C
Humidity (non-condensing)....................................20% to 95% RH
PHYSICAL SPECIFICATIONS
Weight ...........................................................Approximately 7.0 oz
Dimensions (L x W x H) ...............................3.0 x 3.0 x 0.55 inches
Dimensions with Baseplate (L x W x H).......3.6 x 3.0 x 0.55 inches
Case Material.................. Black coated metal, aluminum baseplate
Shielding......................................................................... six - sided
Due to advances in technology, specifications subject to change without notice
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
01/03/2011
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