1. AL8820 for Non-dimmable MR16 LED Driver Solution

2. AL8820 for non-dimmable MR16 LED Driver
What’s HOT
The Diodes Advantage
Input voltage: Typ AC12V;
Output Current accuracy: ±3% ;
High Power Factor: >0.9 ;
High operation frequency : up to 1Mhz;
Integrated NMOS
Protection: OTP, UVLO, Soft Start
Boost stage Protection: OVP；
Buck stage Protection: Short /open load protection
High electronic transformer compatibility
Device 
Min Input Voltage
Max Input Voltage
VOUT
Mos Drive
Voltage
Current
Switch
Integrated MOS RDS(ON)
Feedback
Switching Frequency
Package V A mΩ
kHz
AL8820 5 35
ADJ
VCC 3
200
1.22
<1MHZ
SO8-EP
Improved power dissipation reduces temperature rise  improving reliability over standard solutions
Increases reliability of lamps
Exceeds requirements for 277VAC main voltages
Removes need for start up bleed resistor AL9910: 7.5V VDD:  MOSFETs with VGS(MAX)<12V AL9910A: 10V VDD:  MOSFETs with VGS(MAX)<20V
LD Pin  dimming, thermal control, better accuracy. PWM_D is TTL compatible  better resolution

3. Test Item List Test item Test condition Spec Test Value Input Voltage
With ET
Vac
Output voltage
10v
10V
Output current
650ma
650mA
Output Power
6.5W
6.5w
Efficiency
without ET（12vac）
78%
~71% PF
>0.9
Line regulation
< 0.94%
Load regulation
< 2.0%
output current ripple
<10%
output open protection function
with ET Ok
output open power loss
Without ET（12vac）
0-0.1W
output short protection ok
without et（12vac）
0.7W
Case temperature
Ta=30°C
77.7C
Thermal Shutdown
TOTSD
165
Thermal Shutdown Hysteresis
THYS 20
EMI
12Vac/60hz
EN55022
(30M-1GHZ)
PASS

4. Schematic
Notes: C9,C10,Lm3,R4,C4 ,C7 no connected.

5. BOM – Total 26 Components including AL8820, BOM < $0.7
price
quantity
cost(RMB)
D1,D2,D3,D4
D5,D6
B240
0.12 6 $ R1
50K,0603
0.01 1 $ R2
3K,0603
R6,R7
0.3ohm,1206 2 $
RCS1
0.3ohm ,1206
RCS
0.4ohm,1206 R3
500ohm,0603 R4 NC $ C1
220uf/35v
0.3 $
C2,
2.2uf/50v,1206
0.035 $
C3,C7
100nf/50v,0603
C5,C6
1uf/16V,0603
0.03 $ C8
10uf/35v,0805
0.04 $
C4,C9,C10, L1
2uH/ color ring
inductance
0.1 $ L2
10uh/2A
0.5 $ L3
100uh/1.2A
Lm3
Lm4
1206 F1
Fuse U1
AL8820
　total 26
$0.414
(without PCB and U1 )

6. Efficiency@230V to 12Vac electrical transformer
Efficiency with ET
Input
Voltage
(Vac)
to 12Vac electrical transformer
OSRAM (HTM 70/ )
Philips (ET-E 105)
IBL
( ）
208
65.75%
66.69%
69.90%
220
68.51%
67.61%
70.69%
230
69.18%
68.18%
71.03%
240
69.67%
69.01%
72.20%
253
70.30%
69.09%
72.65%

7. PF@230V to 12Vac electrical transformer
PF with ET
Input
Voltage
(Vac)
to 12Vac electrical transformer
OSRAM (HTM 70/ )
Philip
(ET-E 105)
IBL
( ）
208
0.9726
0.9786
0.9758
220
0.9686
0.9784
0.9731
230
0.9643
0.9828
0.9772
240
0.9593
0.9807
0.9736
253
0.9516
0.9805
0.97

8. @230V to 12Vac electrical transformer
Line Regulation with ET
Input
Voltage
(Vac)
Output Current(mA)
@230V to 12Vac electrical transformer
OSRAM (HTM 70/ )
Philip
(ET-E 105)
IBL
( ）
208
653.22
653.79
655.21
220
652.54
654
653.9
230
653.39
240
653.58
652.32
653.55
253
653.6
653.06
653.8

9. Output Current（mA）@230V to 12Vac electrical transformer
Load Regulation with ET
Output
Voltage
(V)
Output to 12Vac electrical transformer
OSRAM (HTM 70/ )
Philip
(ET-E 105) )
IBL
( ）
6.7
660.87
660.34
660.43 10
652
653.4
653.54
13.4
645
650.14
647.06

10. Electronic Transformers Electronic Transformers
Transformer Compatibility
220Vac to 12Vac electronic transformer compatibility
Electronic Transformers
(230VAC to 12VAC)
Performance Result
Brand
Model 1
OSRAM
ET-Z 60
(20-60W) Y 2
HTM 70/
(20-70W) 3
Philips
ET-E 105
(50-105w) 4
Primaline
(20-70w) 5
SELF
(宁波赛尔富)
SET105F-2
(35-105W) 6
上海申油
NO model
Information
(50w) 7
IBL
Electronic Transformers
(230VAC to 12VAC)
Performance Result
Brand
Model 8
佛山照明
EA-HF50
(20-50w) Y 9
OPPLE
DB35-220/12
(20-35w) 10
三雄.极光
(20-60w) 11 阳光
ET-60E
（20-60w）
Y stand for NO flicker
N stand for flicker

11. Electronic Transformers
Transformer Compatibility
120Vac to 12Vac electronic transformer compatibility
Electronic Transformers
(120VAC to 12VAC)
Performance Result
(No flicker)
Brand
Model 1
LIGHTECH
LET75
(75W) Y 2 3
LET303
(300W) 4
Hatch
RS12-60M
(60W) 5
HATCH
RS12-150
(150W) 6
RS12-30M-LED
(30w) 7
VS12-60W
Y stand for NO flicker
N stand for flicker

12. Figure1 Bench circuit with ET

13. Steady State Waveform with ET
With OSRAM (HTM 70/ ) and 3LEDS in series
Vet
Iet
Vboost
Iled
Vinac=208Vac
Vinac=230Vac
Vinac=253Vac
With Philips (ET-E 105) and 3LEDS in series
Vinac=208Vac
Vinac=230Vac
Vinac=253Vac

14. Steady State Waveform with ET
With IBL（ ） and 3LEDS in series
Vet
Iet
Vboost
Iled
Vinac=208Vac
Vinac=230Vac
Vinac=253Vac

15. Start-up Waveform with ET
With OSRAM (HTM 70/ ) and 3 LEDS in series
Vet
Iet
Vboost
Iled
T=40.61ms
Vinac=230Vac
Vinac=253Vac
With Philips((ET-E 105) ) and 3LEDS in series
Vinac=208Vac
Vinac=230Vac
Vinac=253Vac

16. Start-up Waveform with ET
With IBL（ ） and 3LEDS in series
Vet
Iet
Vboost
Iled
Vinac=208Vac
Vinac=230Vac
Vinac=253Vac

17. Steady State Waveform with ET and different load
With OSRAM (HTM 70/ )
Vet
Iet
Vboost
Iled
With 2LEDS in series
With 3LEDS in series
With 4LEDS in series
With Philips (ET-E 105)
With 2LEDS in series
With 3LEDS in series
With 4LEDS in series

18. Steady State Waveform with ET at Different Load
With IBL（ ）
Vet
Iet
Vboost
Iled
With 2LEDS in series
With 3LEDS in series
With 4LEDS in series

19. Open load to reload waveform
Open Load Operation Waveform
With OSRAM (HTM 70/ )
Vet
Iet
Vboost
Iled
Short load operation waveform
Open load to reload waveform

20. Short load to reload waveform
Short Load Operation Waveform
With OSRAM (HTM 70/ )
Vet
Iet
Vboost
Iled
Short load operation waveform
Short load to reload waveform

21. Thermal Test With OSRAM (HTM 70/230-240) and 3LEDS in series RectifierIC
Rectifier
IC case temperature =77.7°C； Ambient temperature=28.2°C

22. EMI Test condition: Input voltage :12Vac/60hz;
Output load:3LEDs in series

23. Summary compatible with most of electronic transformers High PF
High Efficiency
Good line regulation and load regulation
Has output open / short and OTP protection
Low output current ripple