STMicroelectronics STEVAL-ILL082V1 User Manual

February 2017

DocID030279 Rev 1

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www.st.com

UM2170

User manual

Getting started with smart home lighting based on HVLED815PF

and SPSGRF

Introduction

The STEVAL-ILL082V1 is based on the HVLED815PF off-line LED driver. It consists of a LED driver
board with a connectivity module and the STM32L0 microcontroller, which manages wireless
communication and LED brightness control. The microcontroller and connectivity module are supplied
by the LED driver through an auxiliary winding.

STEVAL-ILL082V1 can be operated in standalone mode through the communication with the bundled
STEVAL-ILL082V1_Remote controller based on SP1ML to help to reduce development and certification
time.

The board can also be rendered visible to cloud applications with the addition of a wireless bridge.

Figure 1: STEVAL-ILL082V1 evaluation board plus remote controller (top view)

Figure 2: STEVAL-ILL082V1 evaluation board plus remote controller (bottom view)

Contents

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Contents

1 Overview .......................................................................................... 5

1.1 Smart home lighting architecture ....................................................... 5

1.2 Hardware description ........................................................................ 6

2 Getting started ................................................................................. 8

2.1 Smart home lighting board used with SPSGRF and SP1ML ............. 8

3 Efficiency testing and measurements ......................................... 10

3.1 Efficiency, power factor, THD, LED current and current regulation . 10

3.2 IEC61000-3-2 class C harmonic measurement............................... 13

3.3 LED dimming versus output power and LED current ...................... 13

3.4 Standby power consumption ........................................................... 13

4 Schematic diagrams ...................................................................... 15

5 Bill of materials .............................................................................. 18

6 Revision history ............................................................................ 23

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List of tables

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List of tables

Table 1: Test conditions ............................................................................................................................ 10

Table 2: Test results ................................................................................................................................. 10

Table 3: STEVAL-ILL082V1 bill of materials ............................................................................................ 18

Table 4: STEVAL-ILL082V1_Remote bill of materials .............................................................................. 21

Table 5: Document revision history .......................................................................................................... 23

List of figures

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List of figures

Figure 1: STEVAL-ILL082V1 evaluation board plus remote controller (top view) ...................................... 1

Figure 2: STEVAL-ILL082V1 evaluation board plus remote controller (bottom view) ................................ 1

Figure 3: Smart home lighting architecture ................................................................................................. 5

Figure 4: STEVAL-ILL082V1 key components (top view) .......................................................................... 6

Figure 5: STEVAL-ILL082V1 key components (bottom view) .................................................................... 7

Figure 6: LED load connection ................................................................................................................... 8

Figure 7: SP1ML (STEVAL-ILL082V1_Remote) remote controller ............................................................ 9

Figure 8: STEVAL-ILL082V1 test setup.................................................................................................... 10

Figure 9: Input voltage versus LED current .............................................................................................. 11

Figure 10: Input voltage versus PF at full load ......................................................................................... 11

Figure 11: THD versus line variation ........................................................................................................ 12

Figure 12: Current regulation .................................................................................................................... 12

Figure 13: Efficiency curve ....................................................................................................................... 12

Figure 14: STEVAL-ILL082V1: full load condition .................................................................................... 13

Figure 15: STEVAL-ILL082V1: LED dimming linearity ............................................................................. 13

Figure 16: STEVAL-ILL082V1: standby consumption versus line variation ............................................. 14

Figure 17: STEVAL-ILL082V1 circuit schematic (1 of 2) .......................................................................... 15

Figure 18: STEVAL-ILL082V1 circuit schematic (2 of 2) .......................................................................... 16

Figure 19: STEVAL-ILL082V1_Remote circuit schematic ........................................................................ 17

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Overview

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1 Overview

The STEVAL-ILL082V1 features:

• Primary side regulation, no optocoupler required

• High power (> 0.95) and low (< 18%) over the entire voltage range

• Quasi resonant operation

• High efficiency (> 84%)

• Open/short LED management

• Up to 15 W operation

• Remote on/off and five steps dimming down to 2.5% using the STEVAL-

ILL082V1_Remote controller

• Low standby power consumption: < 0.5 W

• RoHS compliant

1.1 Smart home lighting architecture

The architecture behind this smart home lighting system involves an LED driver
(HVLED815PF) to supply and monitor the LED load, an STM32L05x microcontroller to
manage the board, a low power sub-GHz module based on the SPIRIT1 RF transceiver
(SPSGRF) for external communication and a remote application running on an Android

®

mobile device to display status information and generate remote commands.

Cloud-based IoT functionality is supported with the introduction of a separate ST wireless
bridge (STEVAL-IDI004V2) or through a remote controller (SP1ML).

Figure 3: Smart home lighting architecture

Overview

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1.2 Hardware description

The top side of the STEVAL-ILL082V1 board is figured below.

Figure 4: STEVAL-ILL082V1 key components (top view)

Key top side components include:

• J1: the input connector for AC voltage input.

• J2: the output connector for the LED load.

• J3: the 10-pin/10-position shrouded connector for STM32 microcontroller firmware

development and debugging.

• HF transformer.

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The bottom side of the STEVAL-ILL082V1 board is figured below.

Figure 5: STEVAL-ILL082V1 key components (bottom view)

Key bottom side components include:

• HVLED815PF: offline constant current LED driver with primary-sensing, integrated
MOSFET, high power factor, low THD and ability to supply 15 W controlled power.

• SPSGRF: low power sub-GHz module based on SPIRIT1 RF transceiver and BALUN.
It enables wireless connectivity requiring no RF experience or expertise for integration.
It has a programmable radio which supports different modulation schemes (e.g. FSK,
GFSK, MSK, GMSK, OOK and ASK). The output power can vary up to 11.6 dBm and
the receiver sensitivity is -118 dBm. Four GPIOs are available and can be
programmed for 32 different input/output functions. SPSGRF is FCC, IC and CE
certified. It is available in two different carrier frequency versions to cater 868 MHz
SRD and 915 MHz ISM bands.

• STM32L05x: ultra-low power 32-bit RISC microcontroller based on the ARM

®

Cortex®-

M0+ core, featuring an advanced APB bus, ADC, timer, I²C, SPI and USART.

• STTH1L06 and STTH2L06: ultra-fast high voltage rectifiers, with low reverse recovery
current and low thermal resistance.

• LDL212: a 3.3 V low dropout regulator (LDO) to supply the MCU and SPSGRF.

• SW1: reset switch for the microcontroller and connectivity module.

Getting started

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2 Getting started

2.1 Smart home lighting board used with SPSGRF and SP1ML

1

Connect LED load (10 LED/32 V 322 mA) to J2.

2

Connect mains voltage (185 – 275 VAC) through input connector J1.

Figure 6: LED load connection