Recom R-78S Series User manual

www.recom-power.com REV.: 2/2020 P-1
R-78S3.3-0.1-EVM-1
Evaluation Module
Features
Evaluation
Module
• 3.3V from a single AA battery or from
an external source (boost converter)
• Efficiency 93%, >80% at 10% load
• Input voltage range down to 0.65V
• Input and output power measurement capability
• Micro-USB type B or 0.100” (2.54mm) pin output
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Under Voltage Lockout DC-DC OFF 0.4VDC
Overload Capability (3) peak duty cycle 10% 150%, 10s
Quiescent Current 160µA
Start-up Time 2ms
Rise Time 800µs
Internal Operating Frequency 1200kHz
Minimum Load 0%
Dropout Voltage 150mV
Output Ripple and Noise 100mVp-p
ON/OFF CTRL DC-DC ON
DC-DC OFF
Open or 0.7V ≤VCTRL<Vin
Short to GND or VCTRL<0.1V
Input Current of CTRL Pin 5µA
Standby Current 7µA
Description
The R-78S3.3-0.1-EVM-1 Evaluation Module generates 3.3V from a single AA battery or from an external
source. By using the external input source, any voltage source (other types of batteries, energy
harvesters, etc.) in the range from 0.65V to 3.15V can be used. The evaluation module contains
a AA battery holder, power switch, R-78S3.3-0.1 boost converter and a micro-USB connector.
Jumper headers are provided to allow various test measurements to be made. An enable pin puts the
R-78S into sleep mode where it draws only 7uA from the battery.
Selection Guide
Part Input Output Output Efficiency (1) Max. Capacitive
Number Voltage Range (3) Voltage Current @ min Vin @ typ. Vin Load (2)
[VDC] [VDC] [mA] [%] [%] [µF]
R-78S3.3-0.1 0.65-3.15 3.3 100 92 93 470
Notes:
Note1: Efficiency is tested at full load. Typ. Vin = 1.5V
Note2: Max. capacitive load is tested at nominal input and full resistive load
Note3: For more information, please refer to “Overload Capability Graph” on page P-2
Specifications (measured @ ta= 25°C, 1.5Vin, full load after warm up unless otherwise stated)

www.recom-power.com REV.: 2/2020 P-2
Evaluation Module
Specifications (measured @ ta= 25°C, 1.5Vin, full load after warm up unless otherwise stated)
R-78S3.3-0.1-EVM-1
Overload Capability Graph
Quick Start Guide
Component Placement
Maximum Output Current [mA]
Input Voltage [V]
0.65
0
20
40
60
80
100
120
150
140
1.3 1.85
1.2 1.8 3.152.4
peak current
continuous current
• Insert the AA battery into the battery holder (only one way possible).
• If powering USB-powered demonstrators: plug in the micro-USB cable.
• Turn on and off using the slide switch.
Note: to reduce the power consumption, no indicator LED is fitted. Remember to switch off to conserve the battery.
• The output voltage is accessed via J7 or the USB port.
• To measure the input and output current of the R-78S, remove the jumpers on J4 and J5. J4 and J5 are standard 0.100” (2.54mm) pin headers to allow
current measurement device connections (ampere meter, scope probe).
• When an external voltage source (no on-board battery) is used on J3, change the jumper position on J1 to pin 1 and pin 2 (VEXT).
• When the on-board AA battery is used, change the jumper position on J1 to pin 2 and pin 3 (VBAT).
• To set the R-78S into sleep mode, apply the provided jumper on both pins of J6 (CTRL to GND).
J3
J1
VEXT
VEXT VBAT
OFF ON
I_IN
I_OUT
VBAT
GND
GND CTRL
VOUT GND
D-
D+
GND
J4 J6 J7
J5
J8
CON1
FOR EVALUATION ONLY
R-78SXX-0.1-EVM-1
S1
U1
J2
BAT1

www.recom-power.com REV.: 2/2020 P-3
Evaluation Module
Specifications (measured @ ta= 25°C, 1.5Vin, full load after warm up unless otherwise stated)
R-78S3.3-0.1-EVM-1
Schematic
Component List
Part Description Setting
BAT1 AA battery holder
J1 3 pin 0.100” (2.54mm) header for VEXT and VBAT Factory set to on-board battery
J2* 2 pin 0.100” (2.54mm) header for VBAT and GND Leave open if not used
J3 2 pin 0.100” (2.54mm) header for VEXT and GND Leave open if not used
J4 2 pin 0.100” (2.54mm) header for input current Leave closed if not used
J5 2 pin 0.100” (2.54mm) header for output current Leave closed if not used
J6 2 pin 0.100” (2.54mm) header for CTRL (enable) and
GND
Leave open if not used
J7 2 pin 0.100” (2.54mm) header for VOUT and GND Leave open if not used
J8 2 pin 0.100” (2.54mm) header for USB D+ and D- Leave open if not used
S1 Slide switch Factory set OFF
CON1 USB micro B connector
U1 R-78S3.3-0.1 boost converter
*Caution:
DO NOT PLACE A JUMPER ON J2. DOING SO WILL CAUSE THE BATTERY TO SHORT CIRCUIT AND CREATE THE RISK OF FIRE.
Vin Vout
GND CTRL
GND
GND
13
2
2
2
1
4
J7
0022032021
002032021
U1 R-78S3.3-0.1
R-78S
GND
GND
0022032021
J8
0022032021
J5
ZX62D-B-5P8
GND
VCC
USB
D+
D-
NC
CON1
1
4
1
2
5
2
3
2
1J6
0022032021
0022032021
0022032021
GND
J4
J1
J2
J3
BAT1
GND S1
2460
2 1 1
3
1
2
2
1 3
MHSI22
22-03-2031
2
1
1
2
1
2

www.recom-power.com REV.: 2/2020 P-4
Evaluation Module
Specifications (measured @ ta= 25°C, 1.5Vin, full load after warm up unless otherwise stated)
R-78S3.3-0.1-EVM-1
Layout
BOM
Top Layer
Bottom Layer
Part Name/Number Description Manufacturer Part Number Manufacturer Qty. Comps.
Battery_Holder_AA Holder Battery 1Cell AA PCB MNT 2460 Keystone Electronics 1 BAT1
JUMPER_2PINS 2 Positions Header Connector 0.100"
(2.54mm) Through Hole Tin 0022032021 Molex 7 J2 J3 J4 J5 J6 J7 J8
JUMPER_3PINS Conn Header 3POS .100 Vert Tin 22-03-2031 Molex 1 J1
MHS122 Switch Slide SPDT 300mA 30V MHS122 APEM Inc 1 S1
R-78S3.3-0.1 DC DC Converter 3.3V R-78S3.3-0.1 RECOM 1 U1
ZX62D-B-5P8 Conn RCPT USB Micro B SMD ZX62D-B-5P8 Hirose Electric Co Ltd 1 CON1
x
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter Type Value
Dimension (LxWxH) 80.0 x 50.0 x 23.0mm
Weight 26g typ.

www.recom-power.com REV.: 2/2020 P-5
Evaluation Module
Specifications (measured @ ta= 25°C, 1.5Vin, full load after warm up unless otherwise stated)
R-78S3.3-0.1-EVM-1
The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause
loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized
use of RECOM products in such safety-critical applications.
• R-78S3.3-0.1-EVM-1 Evaluation Module PBA
• Micro-USB Type B to Micro-USB Type B Cable
• Terms and Conditions Letter
Contents
PACKAGING INFORMATION
Parameter Type Value
Packaging Dimension (LxWxH) carton 200.0 x 135.0 x 68.0mm
Packaging Quantity 1pcs