Technical Specification EVM Board
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2
SNVU542 – July 2017
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Copyright © 2017, Texas Instruments Incorporated
LMS36x5x-Q1 EVM User's Guide
Contents
1
Technical Specification EVM Board
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2
2
Schematics
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3
3
Board Layout
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5
4
Operation and Test Setup
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9
4.1
Efficiency Measurement
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9
4.2
Measure Load Transient
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10
4.3
Measure EMI
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10
5
Posts, Probes, and Jumpers
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11
5.1
VIN1 and GND1 Posts
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11
5.2
VOUT and GND Posts
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11
5.3
IN+ and IN– Posts
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11
5.4
EN and GND2 Probe
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11
5.5
VINS, VOUTS, and GNDS Probe
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11
5.6
BIAS and GNDS Probe
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11
5.7
RESET and GND3 Probe
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11
5.8
SYNC and GND3 Probe
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11
5.9
Jumper J1
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12
5.10
Jumper J2
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12
5.11
Jumper J3
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12
6
Bill of Materials
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12
7
Efficiency and Line and Load Regulation
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14
7.1
Load Transients
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15
7.2
Conducted EMI
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15
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1
Technical Specification EVM Board
Table 2
shows specifications for the LMS3635xQEVM and LMS3655xQEVM board.
Table 2. Technical Specification
BOARD SIZE
4000 × 3000 mil
101 mm × 76 mm
76 cm
2
BOARD LAYER
4-Layer FR4 PCB
Top Layer1 and Bottom Layer2
Mid Layer2 and Mid Layer3
2.8-mil, 2-oz. Cu
1.4-mil, 1-oz. Cu
SOLUTION SIZE
700 mil × 1700 mil
17.78 mm × 43.18 mm
7.68 cm
2
POWER INPUT
VIN1 and GND1
IN+ / IN–
Power Supply Input
Power Input for EMI Test
typical 13.5 V (range 3.5 to 36 V)
typical 13.5 V (range 3.5 to 36 V)
POWER OUTPUT
VOUT and GND
Power Output to Load
typical 3.3 V or 5 V
JUMPERS
J1 FPWM pin
J2 ENABLE pin
J3 RESET pin
Auto Mode or Forced PWM
Enable LMS3635x and LMS3655x
Open-drain output
Set – Default [AUTO-MODE]
Set – Default [EN-VIN]
Optional - [RESET-VOUT]
TEST POINTS
GNDS, GND2 and GND3
EN
VINS
VOUTS
BIAS
RESET
SYNC
Sense GND Points
Enable Pin Voltage
Input Voltage Sense
Output Voltage Sense
BIAS Voltage Sense
RESET output
Switch node SYNC input
Sense Ground
If J2[EN-VIN], then EN = VIN1 3.5 to 36 V
Sense VIN1 3.5 to 36 V
Sense VOUT typical 3.3 V or 5 V
Sense BIAS typical 3.3 V or 5 V
If J3 [RESET-VOUT], then RESET = VOUTS
External sync frequency source
