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Datel 20A User Manual

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DATEL, Inc., Mansfield, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: [email protected] · Internet: www.datel.com
–V
IN
(1)
+V
IN
(3)
OPTO
ISOLATION
PWM
CONTROLLER
REFERENCE &
ERROR AMP
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
* Can be ordered with positive (standard) or negative (optional) polarity
.
REMOTE
ON/OFF
CONTROL*
(2
)
+SENSE
(7
)
–SENSE
(5
)
+V
OUT
(8)
VOUT
TRIM
(6
)
–V
OUT
(4)
SWITCH
CONTROL
Single Output
USQ 20A Models
High-Density, Quarter-Brick
20 Amp, DC/DC Converters
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 1.8V
OUT 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
(200µsec), 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.
Figure 1. Simplified Schematic
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
®
®
A SUBSIDIARY OF C&D TECHNOLOGIES
OBSOLETE PRODUCT
Contact Factory for Replacement Model
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Summary of Contents

Page 1 - Single Output

DATEL, Inc., Mansfield, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: [email protected] · Internet: www.da

Page 2 - OBSOLETE PRODUCT

USQ Series Load Conditions ➀ Performance Specifications 1.2VOUT 1.5VOUT 1.8VOUT 2.5VOUT 3.3VOUT 5VOUT 12 to 24VOUT Load Step = 50 to 7

Page 3

USQ ModelsTypical Performance Curves for 1.2VOUT Models90858075706560USQ-1.2/20-D48 Efficiency vs. Line Voltage and Load Current 2 4 6 8 10 12 14 16

Page 4

USQ SeriesTypical Performance Curves for 1.5VOUT Models

Page 5

USQ ModelsTypical Performance Curves for 1.8VOUT Models     

Page 6 - Trim Equations

USQ SeriesTypical Performance Curves for 2.5VOUT ModelsStart-Up from VIN(VIN = 48V, IOUT = 20A, COUT = 10µF tantalum || 1µF ceramic.)2msec/div1V/div20

Page 7

USQ ModelsTypical Performance Curves for 3.3VOUT Models

Page 8

USQ SeriesTypical Performance Curves for 5VOUT ModelsStart-Up from VIN(VIN = 48V, IOUT = 20A, COUT = 10µF tantalum || 1µF ceramic.)2msec/div1V/div20V/

Page 9 - OUT Return

USQ ModelsTypical Performance Curves for 5VOUT Models

Page 10 - OUT = 220µF

USQ SeriesTypical Performance Curves for 12VOUT ModelsStart-Up from VIN(VIN = 48V, IOUT = 8.3A, COUT = 10µF tantalum || 1µF ceramic.)2msec/div5V/div20

Page 11 - USQ Models

USQ ModelsStart-Up from Remote On/Off Control(VIN = 48V, IOUT = 8.3A, COUT = 10µF tantalum || 1µF ceramic.)2msec/div5V/div2V/div12VOUT (pin 8)Remote O

Page 12 - USQ Series

USQ SeriesUSQ-1.2/20-D48 1.2 20 25 50 ±0.05% ±0.05% 48 36-75 0.63/0.87 80% C33, P32USQ-1.5/20-D48 1.5 20 40 65 ±0.05% ±0.05% 48 36

Page 13

USQ SeriesTypical Performance Curves for 15VOUT Models20 

Page 14

USQ Models21Typical Performance Curves for 24VOUT ModelsStart-Up from Remote On/Off Control(VIN = 48V, IOUT = 4.2A, COUT = 10µF tantalum || 1µF cerami

Page 15

DS-0493D 10/04BOTTOM VIEW–InputRemote On/Off+Input+Output+SenseOutput Trim–Sense–OutputFigure 20. Industry Standard Quarter-Bri

Page 16

USQ ModelsRemote On/Off Control Polarity: Add "P" for positive polarity (pin 2 open = converter on) Add "N" for negativ

Page 17

USQ Series4Removal of Soldered USQ's from PCB'sShould removal of the USQ from its soldered connection be needed, it is very important to tho

Page 18

USQ Models5On/Off ControlThe primary-side, Remote On/Off Control function (pin 2) can be specified to operate with either positive or negative polarity

Page 19 - Control (pin 2)

USQ SeriesLOADRTRIM DOWN+OUTPUT–INPUT+INPUTON/OFFCONTROLTRIM+SENSE–OUTPUT–SENSE45136872LOADRTRIM UP+OUTPUT–INPUT+INPUTON/OFFCONTROLTRIM+SENSE–OUTPUT–S

Page 20

USQ Models70 1 2 3 4 5 6 7 8 9 10VOUT INCREASE (%)RESISTANCE1 x 1061 x 1051 x 1041 x 103Figure 7. USQ-1.2 Trim-Up Resistance vs. % Increase VOUT 0 1 2

Page 21 - 

USQ Series0 1 2 3 4 5 6 7 8 9 10VOUT INCREASE (%)RESISTANCE1 x 1081 x 1071 x 1061 x 105Figure 13. USQ-12 Trim-Up Resistance vs. % Increase VOUT 0 1 2

Page 22 - ISO 9001 REGISTERED

USQ ModelsLOAD+OUTPUT–INPUTSense CurrentContact and PCB resistancelosses due to IR dropsContact and PCB resistancelosses due to IR dropsSense Return+I

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