Datel 20A manual Features,  Outstanding thermal-derating  Output current to 20 Amps

® ®

A SUBSIDIARY OF C&D TECHNOLOGIES

Single Output

USQ 20A Models

High-Density, Quarter-Brick 20 Amp, DC/DC Converters

Features

Standard, 1.45" x 2.28" x 0.40" quarter-brick package and pinout

Outstanding thermal-derating

Output current: to 20 Amps

Outputs Voltages: 1.2/1.5/1.8/2.5/3.3/5/12/15/18/24V

Input voltage ranges:

36-75V (48V nom.)

18-36V (24V nom.)

Synchronous rectification yields high efficiency (to 91%) and stable no-load operation

On/Off control, trim and sense functions

Fully isolated, 1500Vdc guaranteed

Fully I/O protected; Thermal shutdown

UL1950/EN60950 (BASIC insulation) approvals

Qual tested; HALT tested; EMI compliant

For low-voltage, high-current power . . . in the smallest space . . . over the widest temperature range . . . call on DATEL’s USQ Series 20 Amp "quarter bricks." Occupy- ing the industry-standard package (1.45" x 2.28" x 0.40") and pinout, USQ’s house their fully-synchronous, forward design topology in a "two-board" assembly crowned with a heat-sink-compatible aluminum baseplate. This combination of outstanding thermal and electrical efficiencies endows USQ’s with industry-leading, thermal- derating performance. The 1.8VOUT model, for example, delivers its full 20 Amps up to +55°C with a mere 200 lfm air flow.

USQ’s achieve all the performance metrics required for contemporary, on-board power processing: high isolation (1500Vdc), superior efficiency (to 91%), tight regula- tion (to ±0.05% max. line and load), low noise (to 50mVp-p), quick step response (200∝sec), and an array of protection features. I/O protection includes input under- voltage lockout and reverse-polarity protection, as well as output overvoltage pro- tection, current limiting, short-circuit protection, and thermal shutdown. The USQ functionality suite includes remote on/off control (positive or negative polarity), output trim (+10/–20%), and output sense functions.

All USQ DC/DC’s are designed to meet the BASIC insulation requirements of UL1950 and EN60950, and all 48 Volt models will carry the CE mark. Safety certifica- tions, as well as EMC compliance testing and qualification testing (including HALT) have been successfully completed. Contact DATEL for copies of the latest reports.

+SENSE

(7)

+VIN

(3)

–VIN

(1)

PWM

CONTROLLER

SWITCH CONTROL

OPTO

ISOLATION

REFERENCE &

ERROR AMP

+VOUT

(8)

–VOUT

(4)

–SENSE

(5)

VOUT

TRIM

(6)

REMOTE

ON/OFF

CONTROL*

(2)

INPUT UNDERVOLTAGE, INPUT OVERVOLTAGE, AND OUTPUT OVERVOLTAGE COMPARATORS

* Can be ordered with positive (standard) or negative (optional) polarity.

Figure 1. Simplified Schematic

DATEL, Inc., Mansfield, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: sales@datel.com · Internet: www.datel.com