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                          Using the HT45FH3T in the Active 3D Glasses 

 

11 

HT45FH3T 3D Glasses Demo Board – BOM Table 

Main Board 

Type 

Symbol 

Value 

Package

 

Number 

Note 

MCU 

U1 

HT45FH3T-1 

SSOP16 

 

Charging IC 

U2 

IN4054 

SOT23-5 

 

LDO 

U3 

HT7830 

SOT89 

 

Capacitor 

C9,C8 

0.1uF 

0603 

 

 

C6 

10uF 

0805 

 

 

C1,C2,C3,C4,C5 

1uF 

0603 

 

Resistor 

R12 

1K 

0603 

 

 

R14 

1M 

0603 

 

 

R6 

3.3M 

0603 

 

 

R13 

10K 

0603 

 

 

R1 

100 

0603 

 

 

R4,R2 

100K 

0603 

 

 

R3 

NC 

0603 

 

 

R7 

360K 

0603 

 

 

R9,R10 

470 

0603 

 

 

R11 

470K 

0603 

 

LED 

D4,D5 

Red, Yellow 

0603 

 

Inductor 

L1 

100uH 

SMD 

 

N-MOSFET 

Q1,Q2 

AO3400 

SOT23 

 

P-MOSFE 

Q3 

AO3401 

SOT23 

 

Diode 

D1,D2,D3 

BAT54 

SOD232 

 

Button 

SW1 

 

SMD 

 

Connector 

J5 

 

FPC-0.5mm-10pin 

 

USB 

connector 

J6 

 

MINI USB 

 

TVS 

D3 

 

SOD323 

 

IR Receiver Board 

Type 

Symbol 

Value 

Package 

Number 

Note 

OPA 

U1 

OPA2348 

SOT23-8 

 

Comparator 

U2 

LM7239 

SOT23-5 

 

C4 

4.7nF 

0402 

 

C5,C6 

0.1uF 

0402 

 

Capacitor 

C3 

330pF 

0402 

 

R4,R2 

2K 

0402 

 

R6 

3M 

0402 

 

R5 

7.15K 

0402 

 

Resistor 

R1 

200K 

0402 

 

Diode 

D2 

BAT54 

SOD523 

 

Photodiode 

D1 

BPW 34 

 

 

summary 

 

 

 

50 

 

 

Summary of Contents for AN0315E

Page 1: ...of 3D glasses is to receive and decode the IR signals from the TV for 3D glasses control Due to the high voltage driving requirement a boost circuit is needed to increase the battery voltage to 10V 12...

Page 2: ...x 2 HT45FH3T Active 3D Glasses Main Features HT45FH3T Basic Features Operating Voltage 2 2V 5 5V 4MHz System Clock HIRC 4MHz Multi mode operation NORMAL SLOW IDLE and SLEEP Flash Program Memory 2K 16...

Page 3: ...LCD lenses Provides a battery charging indicator LED Y and a low voltage indicator LED R Provides a button for glasses on off control Operating current about 680 A Three stage power saving mode First...

Page 4: ...ed to boost the battery voltage to the LCD lenses switch voltage N MOS Used for inductor booster control Lithium battery A lithium battery with a capacity of 100mAh Battery control circuit Used for th...

Page 5: ...own below OPA OPA CMP TO MCU 15pF 200k 15pF 4 7nF 2k 2k 7 15k VDD 3M 330pF Amplify and filter the tiny current generated by the IR Photodiode Filter the amplified signal with a negative half cycle and...

Page 6: ...generate an external interrupt via INT1 PA6 and turn off the power via PA1 Charging IC Circuit Use an IN4054 for lithium battery charging Setup R13 to be 10K so that a 100mA constant current can be us...

Page 7: ...pplied by the boost circuit increase the LCD control voltage to 10V for the lens on off control Battery Voltage Detect Circuit Use the ADC to check the MCU internal band gap voltage and select the ADC...

Page 8: ...ng together with IR signals with no carrier to implement decode operation and control the LCD lenses Note that LCD lenses must be properly controlled to avoid the liquid crystals remaining at the same...

Page 9: ...Using the HT45FH3T in the Active 3D Glasses 9 PCB Layout Main Board Front Back...

Page 10: ...Using the HT45FH3T in the Active 3D Glasses 10 Receiver Board...

Page 11: ...NC 0603 1 R7 360K 0603 1 R9 R10 470 0603 2 R11 470K 0603 1 LED D4 D5 Red Yellow 0603 2 Inductor L1 100uH SMD 1 N MOSFET Q1 Q2 AO3400 SOT23 2 P MOSFE Q3 AO3401 SOT23 1 Diode D1 D2 D3 BAT54 SOD232 3 Bu...

Page 12: ...Using the HT45FH3T in the Active 3D Glasses 12 Software Flowchart Main Architecture Flowchart...

Page 13: ...Using the HT45FH3T in the Active 3D Glasses 13 LCD Lenses Flowchart...

Page 14: ...the Active 3D Glasses 14 Demo Board Pictures Conclusions As the demand for 3D glasses products is increasing the HT45FH3T can be used to reduce additional circuit requirements and PCB area thus reduc...

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