FAN6921MRMY [ONSEMI]
mWSaver™ 功率因数控制器 (PFC) CrCM + QR PWM 控制器，欠电压保护;
| 型号： | FAN6921MRMY |
| 厂家： | 
ONSEMI |
| 描述： | mWSaver™ 功率因数控制器 (PFC) CrCM + QR PWM 控制器，欠电压保护 控制器 开关 功率因数校正 光电二极管 |
| 文件： | 总22页 (文件大小：1323K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATA SHEET
www.onsemi.cn
↖Ᏸჯꢀꢀᰁჯ PFC/ꢁᛠᔏ
ꢁἡᰁჯ PWM ᖇꢂ
FAN6921MR
ᛄ
SOIC−16
CASE 751BG
ꢀႆꢁᏰŔꢀFAN6921MR ෦ѿ╧
ࣀ
ᝐᨁᵃꢀ(PFC) ᖇЖࡈ
٬Φ
ꢂᔏꢀPWM ᖇЖ
ࡈ
ꢃר
ईꢁꢄ。ꢁᏰ⛽ĦᖰŻfꢅἮꢀᜨŔŔ ꢆꢇ, ꢈ✄
Åίꢉ̣ÖŔᝐꢊ。 MARKING DIAGRAM
ෙnꢀPFC, FAN6921MR ş✈ַᖇොꢋ៖ꢌᑠᤏ᥅ᖰŻꢍꢎ
DC ꢏϚꢀի, ᑇꢐꢑ⌖Ŕѿ╧
ࣀ
ᝐᨁᵃ。ꢋꢒϻថŔꢀTHD øӶ ࡈ
, FAN6921MR
ÅίꢒꢓꢔֱꢌŔꢏͅꢀἡǯ, ꢕ THD ሇꢖ。
ෙnꢀPWM, FAN6921MR ᖰŻπҝѿꢖ᥅ᄚꢀ⁰
ߋ
ꢗሇꢖ: ꢘ ၵ ᪠ Ἣ 、ꢙ ꢚ ᰁ ჯ ꢛ ꢐ
٬
ꢀ/ Įꢜ ꢀ ի ꢒ ѿ ╧ ꢝ ɟ。 FAN6921MR ꢞᖰŻꢟૺƽᒄѿꢖ:
ᴁॷֿრ▏٬ဆ
ꢑ҈ቂ૭Ŕ ꢒἡƽᒄ、ꢉꢑ҈ቂ૭ꢔֱ、ꢋꢒꢀRTჵꢠ
٬
ꢉꢀNTC ꢀꢡ $Y&Z&2&K
FAN6921MR
MYD
$Y
&Z
&2
&K
= onsemi Logo
ൾ▐Ŕ
ꢍꢎꢒꢁƽᒄ、ͥꢉꢒꢁ͓ឍ、V ჵꢠꢀOVP、✈n DD
= Assembly Plant Code
= 2−Digit Date Code Format
= 2−Lot Run Traceability Code
ꢏϚꢀOVP ŔꢀDET ჵꢠꢒի, Å֪✈nꢀAC ꢏͅꢀիꢀUVP Ŕꢋ
ꢀ/ᕩꢀƽᒄ。
FAN6921MR ᖇЖ
ࡈ
ꢢ✈ 16 ჵꢠ෯บෘꢣ (SOP)。 FAN6921MRMYD = Specific Device Code
ሇ
ORDERING INFORMATION
See detailed ordering and shipping information on page 2 of
this data sheet.
•ꢂꢁᏰჯ PFC
٬֭↠ჯᖇЖ
ࡈ
•ꢂꢃꢂᰁჯ PFC ᖇЖ
ࡈ
•ꢂPFC ॷŔꢓꢀἡ᪠Ἣ
•ꢂPWM ॷŔΦꢂᔏꢛꢐ
•ꢂQR PWM ॷŔͥꢉᣠ෯Ȝt
•ꢂPWM Ŕ10 ms ͥꢉꢤ؏҈
•ꢂᴀիƽᒄ
8 ms
OFF
•ꢂꢀ/Įիꢜꢥꢒѿ╧ꢝɟ
•ꢂꢑ҈ቂ૭ꢒἡƽᒄ
•ꢂꢑ҈ቂ૭რ▏ƽᒄ
•ꢂꢉꢦꢧꢔֱꢀ(RT ჵꢠ)
•ꢂ
ꢍꢒꢁꢦꢧꢀ(RT ჵꢠ) •ꢂVDD ჵꢠ⛾ꢏϚꢀի OVP (ꢦꢧ)
•ꢂͥꢉꢁႆ͓ឍ (140°C)
• This is a Pb−Free Device
ၴ✈
•ꢂAC/DC NB ꢨꢩ
ࡈ
•ꢂრჯ SMPS
•ꢂꢀṀ̥ꢀ
ࡈ
© Semiconductor Components Industries, LLC, 2009
1
Publication Order Number:
October, 2022 − Rev. 2
FAN6921MRCN/D
FAN6921MR
ᙲꢃ
†
ꢄꢅ০ꢆ
FAN6921MRMY
᪗ᩍꢇᒄ (OLP) ᰁჯ
ꢈꢉꢂႆීꢊ
−40°C ೃ 105°C
ꢋ᎕
Shipping
ቂ૭
16 ჵ௪෯บෘ᎕ (SOP)
2.500 /
Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
ၴ✈ᨦꢌ
4
3
14
ZCD
6
1
16
INV
OPFC CSPFC
RANGE HV
15
8
13
9
NC
VIN
FAN6921
OPWM
GND
5
CSPWM
VDD
7
COMP
2
RT
FB DET
12 11
10
ࣞ
1. ꢍꢎၴ✈ www.onsemi.cn
2
FAN6921MR
ꢏ᮸ᨦꢌ
2
16
7
15
6
I
HV
27.5V
3
4
14
8
11
5
1
10
9
13
12
ࣞ
2. ꢐ்ᨦꢌ www.onsemi.cn
3
FAN6921MR
ჵ௪ᰝਾ
RANGE
COMP
INV
HV
1
2
3
4
5
16
15
NC
ZCD
VIN
RT
14
13
CSPFC
CSPWM
OPFC
VDD
12
11
10
FB
6
7
8
DET
GND
OPWM
9
ࣞ
3. ჵ௪ᰝਾ ჵ௪ꢑꢒ
ჵ௪ꢆ
1
ꢓӀ
ᛄ
RANGE
RANGE ჵ௪ŔℋᑷꢀꢀVIN ჵ௪ꢀիꢀၓָӶ。ᄳꢀVIN ჵ௪᪠ἫАŔᩣͅꢀիĮn⃘Ȝꢀի៖，ꢀ͖ᚎꢁ▨ℋᑷ，
ᄳᩣͅꢀիꢁ▨ꢀၓ៖，͖ᚎꢁĮℋᑷ。
2
COMP
ᚿ࿎ଇ
ࡈ
ŔᩣϚჵ௪。ൣ᠏ᢸො५ᚿ࿎ଇࡈ
，✈nꢀPFC ᩣϚꢀի֭。ᚵଇࡈ
ͥਾ✃ᣩૺױ
Ჟꢀἡ。 ࣀ
ᵄ，PFC ꢀի֭▏ᢿጵɟ̡ᚈईᚵჵ௪٬
ꢀGND +ᚎਾِԵŔጵɟꢀᢿ。 3
4
INV
ᚿ࿎ଇ
ࡈ
Ŕ֭Ljᩣͅჵ௪。ᚵჵ௪᪗⛰ꢂϦիࡈ
ᖅ PFC ꢀիꢀၓ，ၖᖰŻ PFC ᪗ի٬ᴀի
ƽᒄ。 CSPFC
PFC ᪗ἡƽᒄᶴᩓ
ࡈ
Ŕᩣͅჵ௪，ᚵᶴᩓࡈ
ᖰŻو
℠ἡƽᒄ。ᄳꢀPFC ꢀἡ᪠Ἣꢀℋ⛺Ŕ᪠ἫꢀիАͥ᮸ ⃘Ȝꢀ(0.82 V ͘५Ȝ) ៖，ᚵ PFC რ͓͓₽Å↠Ἓ
و
℠ἡ。 5
CSPWM PWM ᪗ἡƽᒄᶴᩓ
ࡈ
Ŕᩣͅჵ௪，᪗ꢀFB ჵ௪ꢀի᪫ጜꢀPWM ꢀἡᰁჯᖇЖ。Თ✈⛰ꢂꢀℋ᥅᪠ἫꢀPWM რ͓ Ŕრ͓ꢀἡ，ၖᨙᕎꢀPWM t ŔꢀDET ჵ௪⁰ꢀἡෙꢀCS WM ჵ௪ឝҀ᪠Ἣꢀի，®ൾ▐
و
℠ἡ、ꢀ ON
ἡᰁჯᖇЖ
٬
▨/Įএᢿꢀի᪗ѿ╧ጵɟ。 6
7
OPFC
VDD
ࣞ
᧑╁҈ࡈ
ᩣϚ
╁҈᮸ѿ╧ MOSFET。٭
ĭ᧥ᥡᩣϚꢀիꢁ 15.5 V。 ꢀ⁰。
؏҈٬
͓ឍŔ⃘ȜꢀիϦЋꢁ 18 V ٬
7.5 V。؏҈ꢀἡĮn 30 mA ၖ✄࿅ļꢀἡĮnꢀ10 mA。 ࣞ
᧑ᩣϚ
⛿ PWM ǁח
，✈Å╁҈᮸ѿ╧ MOSFET。٭
ĭ᧥ᥡᩣϚꢀիꢁ 17.5 V。 ѿ
╧ऐ٬
ǁח
ऐ。 8
OPWM
GND
9
10
DET
ꢁАÅ⛻ƾŔ，ᚵჵ௪
᪗⛰ꢂꢀℋϦիࡈ
ᖅೃ PWM ָիࡈ
Ŕᩕ҉থঔ: • ⛿⛰ꢂȯӋꢀի，✈Åጵɟ PWM ℠ἡŔ⃘Ȝꢀի，®ᖰŻ᪗ѿ╧ጵɟ。ᄳ PWM რ͓
ො៖，⛿ŔȯӋ⛾ᩣͅꢀի⛰ೄ。
• ᪠Ἣ PWM რ͓⃯ᥡꢀիŔỂᜇꢀիǁ
ח
，®ൾ▐Ểᜇꢀիრ͓ၖᣠଇӛႆऐί PWM რ͓Ŕრ͓ᔿ૧。
• ᖰŻᩣϚ᪗իƽᒄ。ꢀիᶴᩓ
ࡈ
ͥਾn DET ჵ௪ꢃ。DET ჵ௪᪗⛾ᩕ҉থঔၖତŔϦի ࡈ
᪠Ἣԃൺꢀի。ई PWM ꢀዿࡈ
ꢀ，ᚵԃൺꢀի፻֭Аᴁॷথঔ。ୢᩣϚ OVP
٬ᚵԃൺꢀի
▨n 2.5 V，ᖇЖࡈ
᪫ͅ₹ῑᰁჯၖȼᵂ⛰ϧ PFC ٬
PWM რ͓ꢁጜ。 11
FB
֭ꢀիჵ௪。ᚵჵ௪✈nᖅᩣϚꢀիꢀၓǁ
ח
，®ΓൺᛓᩣϚꢀիŔꢀPWM ᧥ᥡՀՊᶴ。ୢꢀFB ჵ௪ ꢀի▨nଇॶꢀ4.2 V ⃘ȜꢀիŔ៖ᡕ᪗ꢀ50 ms，FB ჵ௪ꢀի᪨
Å↠Ἓრ▏、᪗ᩍƽᒄ٬ᩣ
Ϛʽᢿƽᒄ。ᚵჵ ௪Ŕᩣͅℋᑷ᠏⛰ꢂ 5 kW Ŕؙᜨꢀℋ。ई FB
ჵ௪٬
ꢀCSPWM/FB ᶴᩓࡈ
+ᖅf⛰ꢂ 1/3 Ŕፀίࡈ
。 12
13
14
RT
VIN
ZCD
ᛓŔ᪗ꢂƽᒄ٬᮸₹ῑᒶֱ
。RT ჵ௪ᩣϚሲൺŔꢀἡ。ᄳꢀRT ჵ௪ꢀիĮnꢀ0.8 V（͘५Ȝ），ú↠Ἓ₹ ῑᰁჯƽᒄၖঘᵂ⛰ϧ PFC
٬
PWM რ͓ꢁጜ，DŽೃឍრ AC ᖲଔ。 ✈nൾ▐ꢀ/ᕩꢀƽᒄŔএᢿꢀի᪠Ἣ。ᚵჵ௪
Å᪗Ϧիࡈ
ᖅꢀAC ᩣͅꢀիꢀၓ。VINჵ௪Ŕꢀիꢀၓ⛽ ¥✈nᖇЖ RANGE ჵ௪Ŕ⒖ᇡ，᪨✈nෙ AC ᩣͅꢀի UVP ൾ▐ꢀ/ᕩꢀƽᒄ。
PFC ॷŔꢁꢀἡ᪠Ἣ。ᚵჵ௪ᖅೃ⛾ꢀPFC ꢀዿ
ࡈ
থঔꢃר
Ŕᩕ҉থঔ，✈nईꢀPFC ꢀዿࡈ
ꢀἡꢀೃꢁ៖᪠ ἫꢀZCD ꢀիǁ
ח
。ᄳ᪠ἫАꢀZCD ꢀիǁח
៖，ᖇЖࡈ
რ⛰ꢂថŔꢀPFC რ͓و
。ᄳꢀZCD ჵ௪ꢀի፻ᒩೃĮ nꢀ0.2 V (͘५Ȝ) ៖，ᚵჵ௪ё✈ꢀPFC ॷꢀᢿၖ✄ᖇЖ
ࡈ
ȼᵂꢀPFC რ͓ᚭļ。ୢꢂᑑё✈ꢀPFC ॷꢀᢿ，
᪗⛰ꢂ᮸ꢀᢿൾ▐。
15
16
NC
HV
ៀᖅ
▨ի؏҈。HV ჵ௪᪗⛰ꢂꢀℋꢀ(100 kW ͘५Ȝ) ᖅೃ AC এꢀի，®
ױ
V ꢀᖰŻ▨̥ꢀꢀἡ。
DD
www.onsemi.cn
4
FAN6921MR
ভꢔᣠꢕ⍭ꢑꢖ
ꢆ ꢗᝐ
ᣠꢘꢖ ᣠꢕꢖ
ꢙꢚ
V
V
DD
V
HV
30
ꢀ⁰ꢀի (DC)
HV
500
V
V
OPFC, OPWM
−0.3
−0.3
−0.3
25.0
7.0
V
H
V
͖ൣ (INV, COMP, CSPFC, DET, FB, CSPWM, RT)
V
L
V
ZCD
А ZCD ჵ௪Ŕᩣͅꢀի。
12.0
800
V
P
ѿ૧
mW
°C/W
°C/W
°C
°C
°C
V
D
JA
JC
q
q
⋍ℋꢀ(ণАՊᷴ)
104
⋍ℋꢀ(ণА)
41
T
࿅ļণꢂ
−40
−55
+150
+150
+260
4500
1250
J
T
STG
സʈꢂႆී
ࣔ
T
ჵ௪ꢂႆꢀ(⋪ᖅ，10 Ң)
L
ESD
ijᰁ५，JESD22−A114 (ꢃ HV ჵ௪Ŕᐠᣩჵ௪) (ᛄ 2)
̣Ö̥ꢀᰁ५，JESD22−C101 (ꢃ HV ჵ௪Ŕᐠᣩჵ௪) (ᛄ 2)
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
(֢ꢄᚡᝧ)
ୢꢀիᡕ᪗ᣠଇꢄൺȜጸꢃϷϚŔȜී
ࣔ
，ࡈ
Ö
்úᔿय。ୢᡕ᪗Ûĵ᪩{℠Ȝ，෦ៀẵƽᚑࡈ
Öѿ்，
்úොೄࡈ
Öᔿय，ᅑڭ
ꢅሇ。 1. ἫᅷŔᐠᣩꢀի，ꢃ࿎ᰁꢀի+，ᯍ֢⍇ GND ჵ௪。
2. ӥ
؋
HV ჵ௪ईͥŔᐠᣩჵ௪: CDM = 750 V，HBM 1000 V。 ᖈภŔꢈꢉꢅ
ꢆ ꢗᝐ
ᣠꢘꢖ
−40
ᣠꢕꢖ
Եĭ
°C
T
A
࿅ļ▏ꢂႆ
+105
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
(֢ꢄᚡᝧ)
▨nᖈภ࿅ļී
ࣔ
ጸꢃᐠϷꢀի៖，⛽ƽᚑ்૿ᵃဘꢁጜ。⁏៖ईᖈภ࿅ļීࣔ
ጸꢃᒔൺීࣔ
ÅŔꢀի⛻ꢁጜ，
்úᅑࡈڭ
ÖŔ
ꢅሇ。 www.onsemi.cn
5
FAN6921MR
ꢁᷴሇ
ꢃꢆ
׆
ᣩᛄ, V = 15 V, T = −40°C ~ 105°C (T = T )。ꢀ DD
A
A
J
ꢆ ᮸ꢛ
ꢗᝐ
ꢈꢉꢅ
ᣠꢘꢖ
ꢍꢎꢖ
ᣠꢕꢖ
ꢙꢚ
V
DD
V
ঽ࿅ļꢀի
ො⃘Ȝꢀի
−
−
25
V
OP
V
16.5
18.0
19.5
DD−ON
DD−PWM−OFF
V
V
V
PWM ͓ឍ⃘Ȝꢀի
͓ឍ⃘Ȝꢀի
؏҈ꢀἡ
9
6.5
−
10
7.5
20
11
8.5
30
V
V
DD−OFF
I
V
= V − 0.16 V,
DD−ON
mA
DD−ST
DD
᧥ᥡრᢿ
I
࿅ļꢀἡ
V
= 15 V,
−
−
−
10
mA
mA
DD−OP
DD
OPFC, OPWM = 100 kHz,
, C = 2 nF
C
L−PFC
L−PWM
I
ൂᰁჯ࿅ļꢀ⁰ꢀἡꢀ(ၓध)
PWM ͓ឍ៖Ŕ࿅ļꢀἡ
V
= 15 V, OPWM = 450 Hz,
5.5
−
DD−GREEN
DD
C
= 2 nF
L−PWM
I
V
V
V
= V
− 0.5 V
70
26.5
100
−
120
27.5
150
120
170
28.5
200
−
mA
V
DD−PWM−OFF
DD
DD−PWM−OFF
V
V
᪗իƽᒄ (Latch−Off)
OVP ֛ᑶ៖
DD−OVP
DD
DD
DD
t
V
V
ms
mA
VDD−OVP
I
᪗իƽᒄ₹ῑრ؏ƽᓡꢀἡ
= 7.5 V
DD−LATCH
DD
HV ꢜꢝꢁ⁰ꢁἡ᮸ꢛ
V
HV ჵ௪⛺Ŕᣠ෯؏҈ꢀի
⁰ꢀHV ჵ௪ŔŻꢀꢀἡ
−
−
−
50
V
HV−MIN
I
1.3
−
mA
= 90 V (V = 120 V),
= 0 V
HV
AC
V
DC
DD
HV = 500 V, V = V
+ 1 V
−
1
−
mA
DD
DD−OFF
VIN
٬
RANGE ᮸ꢛ V
ACꢀᩣͅᴀիƽᒄŔ⃘Ȝꢀի
ᴀիƽᒄᲝਾꢀիꢀ(✈n؏҈)
0.95
1.00
1.05
V
V
VIN−UVP
V
V
V
V
VIN−UVP
+0.35 V
VIN−RE−UVP
VIN−UVP
+0.25 V
VIN−UVP
+0.30 V
t
ᴀիƽᒄ֛ᑶ៖ꢀ(
ई؏҈٬ᐳ
ᰁჯ⛻⛽ꢂᑑ) 70
100
130
ms
VIN−UVP
V
RANGE ᶴᩓ
ࡈ
Ŕ▨ V RANGE ᶴᩓ
ࡈ
ŔĮ V ⃘Ȝ
⃘Ȝ
2.40
2.05
70
−
2.45
2.10
100
−
2.50
2.15
130
0.5
50
V
V
VIN−RANGE−H
VIN
VIN
V
VIN−RANGE−L
t
ී
ࣔ
؏✈/ё✈֛ᑶ៖ ms
V
RANGE
V
RANGE ჵ௪ŔᩣϚĮꢀի
I =1 mA
O
RANGE−OL
RANGE−OH
I
RANGE ჵ௪ŔᩣϚ▨⃯ꢀἡ
PFC ᣠଇො៖
RANGE = 5 V
= 24 kW
−
−
nA
ms
t
R
22
25
28
ON−MAX−PFC
MOT
www.onsemi.cn
6
FAN6921MR
ꢁᷴሇ
ꢃꢆ
׆
ᣩᛄ, V = 15 V, T = −40°C ~ 105°C (T = T )。ꢀ(continued) DD
A
A
J
ꢆ ꢗᝐ
ꢈꢉꢅ
ᣠꢘꢖ
ꢍꢎꢖ
ᣠꢕꢖ
ꢙꢚ
PFC ꢁᢿ
ꢁիᚿ࿎ꢕꢄ᮸ꢛ
Gm
ᢸොꢀ(Note 3)
100
2.465
2.70
2.60
1.06
1.04
2.25
−
125
2.500
2.75
2.65
−
150
2.535
2.80
2.70
1.14
1.08
2.45
2.95
2.80
90
mmho
V
REF
֭ᶴᩓ
ࡈ
֢ꢄꢀի ٭
ĭ▨֭ꢀի V
V
V
RANGE = რᢿ
RANGE = ᖅऐ
INV−H
V
٭
ĭ▨ᩣϚꢀիᶴūꢀ(ᛄ 3) V/V
V
V
/V
RANGE = რᢿ
RANGE = ᖅऐ
RATIO
INVH REF,
/V
−
INVH REF,
V
INV−L
٭
ĭĮ֭ꢀի 2.35
2.90
2.75
70
V
V
V
INV ᩣͅŔ᪗իƽᒄ
RANGE = რᢿ
RANGE = ᖅऐ
INV−OVP
−
t
᪗իƽᒄ֛ᑶ៖
INV ᩣͅŔᴀիƽᒄ
ᴀիƽᒄ֛ᑶ៖
50
ms
V
INV−OVP
V
0.35
50
0.45
70
0.55
90
INV−UVP
t
ms
V
INV−UVP
V
✈nᕩꢀƽᒄŔꢀPWM
٬
ꢀPFC ͓ឍ ⃘Ȝ
1.15
1.20
1.25
INV−BO
V
✈nᕩꢀƽᒄŔꢀCOMP ჵ௪℠Ж
ꢀի
1.55
1.60
1.65
V
COMP−BO
V
ᶴᩓ
ࡈ
ᩣϚ▨ꢀի 4.8
1.10
15
−
6.0
1.40
45
V
V
COMP
V
COMP ჵ௪ꢁՀՊᶴꢀի
ᶴᩓ
ࡈ
ᩣϚ⁰ꢀἡ 1.25
30
OZ
I
V
V
= 2.3 V, V
= 1.5 V
COMP
mA
mA
mA
COMP
INV
= 1.5 V
0.50
20
0.75
30
1.00
40
INV
ᶴᩓ
ࡈ
ᩣϚ∬ꢀἡ RANGE = რᢿ,
= 2.75 V, V
V
INV
= 5 V
= 5 V
COMP
RANGE = ᖅऐ,
20
30
40
V
INV
= 2.65 V, V
COMP
PFC ꢁἡ᪠Ἣ᮸ꢛ
V
و
໐Ȝꢀἡ℠ЖŔ⃘Ȝꢀի Āᚍზ
V
COMP
= 5 V
−
−
0.82
110
−
V
ns
CSPFC
t
200
250
1.00
PD
t
ЭẟὨꢇ៖
110
0.90
180
0.95
ns
BNK
A
V
THD Ŕ CSPFC ጵɟᶴū
V/V
PFC ᩣϚ᮸ꢛ
V
PFCꢀ᧥ᥡᩣϚ
٭
ĭꢀի PFCꢀ᧥ᥡᩣϚꢀիĮꢀၓ
PFCꢀ᧥ᥡᩣϚꢀի▨ꢀၓ
PFCꢀ᧥ᥡᩣϚ⛺ԧ៖
PFCꢀ᧥ᥡᩣϚ⛻ꢈ៖
V
DD
V
DD
V
DD
V
DD
V
DD
= 25 V
14.0
−
15.5
−
17.0
1.5
−
V
V
Z
V
OL
= 15 V, I = 100 mA
O
V
OH
= 15 V, I = 100 mA
8
−
V
O
t
R
= 12 V, C = 3 nF, 20~80%
30
30
65
50
100
70
ns
ns
L
t
F
= 12 V, C = 3 nF, 80~20%
L
PFC ⇆ꢁἡ᪠Ἣ᮸ꢛ
V
ᩣ⃘ͅȜꢀի⛺ԧẟ
⃘Ȝꢀի₾
ࢾ
V
V
⛺ԧ
⛻ꢈ
1.9
0.25
8
2.1
0.35
10
2.3
0.45
−
V
V
V
V
ZCD
ZCD−HYST
ZCD
V
ZCD
V
٭
ĭꢀի⛺℠ I
= 3 mA
ZCD−HIGH
ZCD
V
٭
ĭꢀի⛻℠ 0.40
0.65
0.90
ZCD−LOW
www.onsemi.cn
7
FAN6921MR
ꢁᷴሇ
ꢃꢆ
׆
ᣩᛄ, V = 15 V, T = −40°C ~ 105°C (T = T )。ꢀ(continued) DD
A
A
J
ꢆ ꢗᝐ
რ⁰ꢀἡ⃘Ȝꢀի
ꢈꢉꢅ
ᣠꢘꢖ
1.3
ꢍꢎꢖ
1.4
ᣠꢕꢖ
1.5
ꢙꢚ
V
V
ZCD−SSC
t
®ꢁꢀἡ᪠ἫАᩣϚොŔᣠଇ
ზ
V
COMP
= 5 V, f = 60 kHz
100
−
200
ns
DELAY
S
t
Ო؏៖
300
1.5
500
2.5
0.2
150
700
3.5
ms
ms
V
RESTART−PFC
t
ᑱЖ៖ꢀ(ᣠଇრ͓ꢉ╧℠Ж)
PFC ؏✈/ё✈ѿ⃘்Ȝꢀի
PFC ؏✈/ё✈ƽᒄზ៖
V
V
= 5 V
INHIB
COMP
V
0.15
100
0.25
200
ZCD−DIS
ZCD−DIS
t
= 100 mV
ms
ZCD
www.onsemi.cn
8
FAN6921MR
ꢁᷴሇ
ꢃꢆ
׆
ᣩᛄ, V = 15 V, T = −40°C ~ 105°C (T = T )。ꢀ(continued) DD
A
A
J
ꢆ ꢗᝐ
ꢈꢉꢅ
ᣠꢘꢖ
1⁄2.75
ꢍꢎꢖ
ᣠꢕꢖ
1⁄3.25
ꢙꢚ
PWM ॷ
֭ᩣͅ᮸ꢛ
A
V
ᩣͅꢀիೃꢀἡዿἫፀίꢀ(ᛄ 3)
A = DV
/ DV ,
FB
1⁄3.00
V/V
V
CSPWM
0 < V
< 0.9
CSPWM
Z
ᩣͅℋᑷꢀ(ᛄ 3)
ȯਾꢀἡ
FB > V
FB = V
3
5
7
kW
mA
V
FB
G
I
−
1.2
0.9
4.2
50
2.0
1.1
4.5
60
OZ
OZ
V
OZ
ꢁՀՊᶴᩣͅꢀի
რ▏ƽᒄ⃘Ȝꢀի
რ▏ƽᒄზ៖
ͥ᮸ᨿ؏҈៖ꢀ(ᛄ 3)
0.7
3.9
40
8.5
V
V
FB−OLP
FB−OLP
t
ms
ms
t
−
V
FB
= 0 V ~ 3.6 V
9.5
10.5
FB SS
DET ჵ௪ꢞOVP
٬
Ểᜇ᪠Ἣ᮸ꢛ V
ᶴᩓ
ࡈ
֢ꢄꢀի რ▏ƚ (ᛄ 3)
ƚဆඝ (ᛄ 3)
ᩣϚ OVP (₹ῑ) ֛ᑶ៖
ᣠଇꢀἡ⁰
2.45
−
2.50
60
1
2.55
−
V
dB
MHz
ms
DET−OVP
A
V
BW
−
−
t
100
−
150
−
200
1
DET−OVP
I
V
= 0 V
mA
V
DET−SOURCE
DET
V
٭
ĭꢀի⛺℠ I
= −1 mA
−
−
5
DET−HIGH
DET
DET
V
٭
ĭꢀի⛻℠ I
= 1 mA
0.5
150
0.7
200
0.9
250
V
DET−LOW
VALLEY−DELAY
t
®Ểᜇǁ
ח
᪠ἫАᩣϚොŔზ ៖ꢀ(ᛄ 3)
ns
t
ᄳ PWM MOS ͓ឍ៖ DET-OVP
(2.5 V) ЭẟὨꢇ
៖٬Ểᜇ
ǁח
ꢀ (ᛄ 3)
3
8
4
9
5
ms
ms
OFF−BNK
t
t
ᡕ៖ 10
TIME−OUT
OFF−MIN
PWM ᔏัꢄ᮸ꢛ
t
ᣠଇො៖
38
7
45
8
52
9
ms
ms
ON−MAX−PWM
t
ᣠ෯͓ឍ៖
V
V
. V , T = 25°C
OFF−MIN
FB
N
A
= V
32
37
42
FB
G
V
V
FB ꢀիꢀၓൂᰁჯრ؏Ŕრ
FB ꢀիꢀၓൂᰁჯ͓₽Ŕრ
1.95
1.00
−
2.10
1.15
0.1
2.25
1.30
−
V
V
V
N
G
DV
FB ꢀիꢀၓൂᰁჯ͓₽რ₾
ࢾ
G
V
✈n؏✈
ڈ
ё✈ PFC Ŕ FB ჵ௪ ⃘Ȝꢀի
1.70
1.60
1.85
1.70
400
2.0
1.75
1.65
1.90
1.75
500
2.5
1.80
1.70
1.95
1.80
600
3.0
V
V
RANGE ჵ௪ͥ᮸რᢿ
RANGE ჵ௪ͥ᮸ᖅऐ
RANGE ჵ௪ͥ᮸რᢿ
RANGE ჵ௪ͥ᮸ᖅऐ
PFC ؏✈→ё✈
CTL−PFC−OFF
V
✈nё✈
ڈ
؏✈ PFC Ŕ FB ჵ௪ ⃘Ȝꢀի
CTL−PFC−ON
t
PFC ё✈֛ᑶ៖
ms
ms
ms
ms
PFC−OFF
t
PFC ؏✈֛ᑶ៖
PFC ё✈→؏✈
PFC−ON
t
؏҈ᙱ៖
ࡈ
（ᡕ៖ᙱ៖ࡈ
） 1.85
22
2.25
28
2.65
34
V
< V
STARTER−PWM
FB
FB
G
V
> V
FB−OLP
www.onsemi.cn
9
FAN6921MR
ꢁᷴሇ
ꢃꢆ
׆
ᣩᛄ, V = 15 V, T = −40°C ~ 105°C (T = T )。ꢀ(continued) DD
A
A
J
ꢆ ꢗᝐ
ꢈꢉꢅ
ᣠꢘꢖ
ꢍꢎꢖ
ᣠꢕꢖ
ꢙꢚ
PWM ᩣϚ᮸ꢛ
V
PWM ᧥ᥡᩣϚ
٭
ĭꢀի PWM ᧥ᥡᩣϚꢀիĮꢀၓ
PWM ᧥ᥡᩣϚꢀի▨ꢀၓ
PWM ᧥ᥡᩣϚ⛺ԧ៖
PWM ᧥ᥡᩣϚ⛻ꢈ៖
V
V
V
= 25 V
16.0
−
17.5
−
19.0
1.5
−
V
V
CLAMP
DD
DD
DD
V
OL
= 15 V, I = 100 mA
O
V
OH
= 15 V, I = 100 mA
8
−
V
O
t
R
C = 3 nF, V = 12 V, 20~80%
−
80
40
110
70
ns
ns
L
DD
t
F
C = 3 nF, V = 12 V, 20~80%
−
L
DD
ꢁἡ᪠Ἣ᮸ꢛ
t
ᩣϚზ
−
150
0.84
0.72
0.58
0.40
0.30
0.10
300
−
200
0.87
0.75
0.61
0.46
0.35
0.15
−
ns
V
PD
V
CSPWM ჵ௪⛺Ŕ᪗ѿ╧ጵɟꢀ
ի℠Ж
0.81
0.69
0.55
0.34
0.25
0.05
−
I
I
I
I
t
t
< 75 mA, T = 25°C
LIMIT
DET
DET
DET
DET
A
= 185 mA, T = 25°C
A
= 350 mA, T = 25°C
A
= 550 mA, T = 25°C
A
V
╧ጵɟꢀ(ᛄ 3)
ЭẟὨꢇ៖
V
= 45 ms, RANGE = რᢿ
= 0 ms
SLOPE
ON
ON
t
ns
V
ON−BNK
V
CSPWM ჵ௪ਾꢀVCSPWM
ᾃĭ▨ի
CSPWM ჵ௪ਾ
CSPWM ჵ௪ਾ
4.5
5.0
CS−FLOATING
t
CSPWM ჵ௪ਾ
Ŕზ៖ −
150
−
ms
CS−H
RT ჵ௪᪗ꢂꢇᒄ᮸ꢛ
T
ͥ᮸ OTP Ŕ⃘Ȝꢂႆꢀ(ᛄ 3)
ͥ᮸ OTP Ŕ₾
ࢾ
ꢂႆꢀ(ᛄ 3) RT ჵ௪ͥ᮸⁰ꢀἡ
125
−
140
30
155
−
°C
°C
mA
V
OTP
OTP−HYST
T
V
I
90
100
0.80
110
0.85
RT
₹ῑᰁჯᒶֱꢀի
0.75
RT−LATCH
V
₹ῑᰁჯᲚꢀի
V
V
V
V
RT−LATH
+0.15
RT−LATH
+0.20
RT−LATH
+0.25
RT−RE−LATCH
V
lॷ֛ᑶ៖⃘Ȝꢀի
OTP ֛ᑶ៖
0.45
−
0.50
10
0.55
−
V
RT−OTP−LEVEL
t
ms
ms
RT−OTP−H
t
᮸ᒶֱ֛ᑶ៖
V
RT
< V
RT−OTP−LEVEL
70
110
150
RT−OTP−L
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
(֢ꢄᚡᝧ)
ꢃꢆ
׆
ᣩᛄ，“ꢀᷴሇ”ጸꢃϷϚŔ᠏ᐠϷἫᚥÖ⛻Ŕڡ
ሇ்֢ᝐ。ୢई⛽
Ö⛻ꢁጜ，ڡ
ሇ்
்⛾“ꢀᷴሇ”ጸ ꢃᐠϷሇ்֢ᝐ⛽⛰ೄ。
3. ᚎᙱƽᚑ。
www.onsemi.cn
10
FAN6921MR
ꢍꢎሇ்ᅡ
᪩{ᅡ
ࣞ
ई T = 25°C Ö⛻᪫ጜᄲ⛰Ӷ。 A
18.5
18.0
17.5
17.0
16.5
11.0
10.5
10.0
9.5
9.0
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
5. PWM ͓ឍ⃘ꢖꢁի ࣞ
4. ො⃘ꢖꢁի 29.0
8.5
8.0
7.5
7.0
6.5
28.5
28.0
27.5
27.0
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
7. VDD ᪗իꢇᒄ⃘ꢖ ࣞ
6. ͓ឍ⃘ꢖꢁի 8.0
7.0
16.0
14.0
12.0
10.0
8.0
6.0
5.0
4.0
6.0
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
9. ꢈꢉꢁἡ ࣞ
8. ꢜꢝꢁἡ 2.60
2.55
2.50
2.45
2.40
17.0
16.5
16.0
15.5
15.0
14.5
14.0
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
11. PFC ᧥ᥡᩣϚ٭
ꢚꢁի ࣞ
10. PFC ᩣϚ֭ꢗꢁ www.onsemi.cn
11
FAN6921MR
ꢍꢎሇ்ᅡ ( ᖅ⛺ꢊ)
᪩{ᅡ
ࣞ
ई T = 25°C Ö⛻᪫ጜᄲ⛰Ӷ。 A
0.95
0.90
0.85
28.0
27.0
26.0
25.0
24.0
23.0
22.0
0.80
0.75
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
13. PFC ໐ꢖꢁἡ℠ꢂꢁի ࣞ
12. PFC ᣠꢕො៖ 19.0
18.5
18.0
17.5
17.0
16.5
16.0
50.0
48.0
46.0
44.0
42.0
40.0
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
14. PWM ᧥ᥡᩣϚ٭
ꢚꢁի ࣞ
15. PWM ᣠꢕො៖ 1.4
1.3
1.2
1.1
1.0
2.3
2.2
2.1
2.0
1.9
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
17. VFB ൂᰁჯ͓ឍŔრ ࣞ
16. VFB ൂᰁჯොŔრ 9.0
42.0
40.0
38.0
36.0
34.0
32.0
8.5
8.0
7.5
7.0
−40 −25 −10
5
20 35 50 65 80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95 110 125
Temperature (°C)
Temperature (°C)
ࣞ
19. VFB ŔꢀPWM ᣠꢘ͓ឍ៖ꢞ= VG ࣞ
18. VFB ŔꢀPWM ᣠ෯͓ឍ៖ꢀ> VN www.onsemi.cn
12
FAN6921MR
ꢍꢎሇ்ᅡ ( ᖅ⛺ꢊ)
᪩{ᅡ
ࣞ
ई T = 25°C Ö⛻᪫ጜᄲ⛰Ӷ。 A
2.60
2.55
2.50
2.45
2.40
1.0
0.9
0.8
0.7
0.6
0.5
−40 −25 −10
5
20 35 50 65
80 95 110 125
110 125
−40 −25 −10
5
20 35 50 65 80 95
Temperature (°C)
Temperature (°C)
ࣞ
21. DET ჵ௪᪗իꢇᒄꢗꢁի ࣞ
20. DET ჵ௪ᩓĮŔ٭
ꢚꢁի 110
105
100
95
0.90
0.85
0.80
0.75
0.70
90
110 125
−40 −25 −10
5
20 35 50 65
80 95 110 125
−40 −25 −10
5
20 35 50 65 80 95
Temperature (°C)
Temperature (°C)
ࣞ
22. RT ჵ௪ꢏ᮸⁰ꢁἡ ࣞ
23. RT ჵ௪᪗ꢂꢇᒄ⃘ꢖꢁի www.onsemi.cn
13
FAN6921MR
ꢐ்ᛄ
PFC ꢁᢿ
Error
PFC V
O
Amplifier
ꢀꢁꢀꢂꢃꢄꢅꢆꢇ THD ꢈꢉꢆ
V
COMP
PFC RS
MOS
2.5 V
R
ꢄfൾ▐ᣔœᅷ҈ᇡሇꢖ，ᣔᇋᅷɼᇡ
ڭ
ၴ٬
ގ
̾ ŔꢀPFC ꢏϚ
٭
ĭ，FAN6921MR ꢢ✈ꢁꢅဆᣩ✃ᣩϻ ថ५ૺ
ױ
ꢊᚿ࿎ଇࡈ
Ŕᢸො५ଇࡈ
。ᚵଇࡈ
Ŕ տ◦
ࣞ
ୢࣞ
ꢀ24 ᐠЊ。ꢋꢒꢃꢀR1 ٬
ꢀR2 ꢃᏰŔꢉꢀ ꢡϦիꢀꢥ®ꢀINV ჵꢠ᪠ἫꢀPFC ꢏϚꢀի。ᄳꢀPFC
ꢏϚꢀիָӶᡕꢒĮn֢ꢀիꢀ2.5 V Ŕꢀ6% ៖，
ૺ
ױ
ꢊᚿ࿎ଇࡈ
ꢍꢎ͖ꢏϚ∬ꢀἡ⁰ꢀἡ᥅ᖰꢀ ▏ꢥ
ڭ
ၴ，ِӶꢝɟꢀꢥ。 1
Filp−Flop
3
INV
+
THD
Optimizer
S
4
R
2
R
S
+
CSPFC
Sawtooth
Generator
FAN6921
ࣞ
25. ဆᣩ THD øӶꢄŔૺױ
Ჟᚿ࿎ꢕꢄ PFC V
O
2.65 V
2.35 V
I
(Fixed On−Time)
LAVG
I
(with THD Optimizer)
LAVG
R
1
C
O
COMP
2.5 V
INV
C
COMP
Error
Amplifier
R
2
Gate Signal
with
THD Optimizer
FAN6921
V
COMP
Sawtooth
Gate Signal
with
ࣞ
24. ૺױ
Ჟᚿ࿎ꢕꢄ Fixed On−Time
INV ჵꢠŔ֭ꢀիǁ
ח
⛾֢ꢀիꢀ2.5 V ꢕꢐᶴ ᩓ，şᅷᚿ࿎ଇ
ࡈ
⁰ꢀἡ∬ꢀἡෙ͖ꢏϚꢀࡈ
ꢀ ꢕꢐ̥ꢀꢀ。COMP ꢀի⛾ͥꢉ⛿ᏰŔ
ࣞ
26. ဆᣩ٬⛽ဆ
THD øӶꢄ៖
ࣚ
ꢑො៖ŔꢈꢉỂᅂ C
COMP
̿Ểᅂꢕꢐᶴᩓ，®ꢈ̾ൺꢀPFC ᧥ᥡŔොꢋ៖ꢌ。ꢋ
ဘ᥅ᛄ，ꢃn֭▏ꢥဆඝᩓĮ，PFC ᧥ᥡොꢋ៖ꢌ
ŔָӶၴᚵ∮ဘ෯，ईꢁꢅꢏͅꢀAC
و
ͥπ. ሲൺ。⌖ꢈ，ᩋᩍÖ⛻ꢛꢐŔѿ╧
ࣀ
ᝐᨁᵃꢀꢥᣩ ꢁꢅਊ⊙，Փꢒꢓǯ。ꢒꢓǯşꢏͅꢀἡǯၖ
ş
ߋ
ꢗማꢂỂǯႆꢀ(THD) ָᅷᣔ࿎。ꢄfݤ
ᩋᩍ Ö⛻ŔማꢂỂǯႆ，ค͖᠏ईꢀꢏͅꢀի⛻，ꢋ
ꢒෙꢀἡ᪠ἫꢀꢡꢆƇŔꢀիꢕꢐꢢᨗᖲͅꢁꢅϻថ
५ꢀTHD øӶ
ࡈ
。ᚵꢀἡ᪠Ἣꢀꢡ⛺Ŕꢢᨗꢀի፻Ί ҀА̿Ểᅂ，✈nꢍЖꢀPFC ᧥ᥡොꢋ៖ꢌ，
ࣀ
ᵄई ԪꢅꢀAC
و
ͥ⛽᠏ሲൺŔොꢋ៖ꢌ。THD øӶࡈ
٬
ꢀ PWM +ꢌꢛꢐᰁषŔយჯୢ
ࣞ
ꢀ25 ᐠЊ。ईꢀAC ꢏͅ ꢀի∰᪡Ểꢘ៖，ꢅꢀTHD øӶ
ࡈ
◦
，ꢝɟොꢋ ៖ꢌָᅷᶴտ᥅⁏。THD øӶ
ࡈ
ş∰᪡໐ȜꢀիŔꢀP FCොꢋ៖ꢌ৹ʽ。PFC MOS
Ŕ៖ၯ٬ꢀዿ
ࡈ
ꢀἡŔ Ểᅂୢ
ࣞ
ꢀ26 ᐠЊ。ࣞ
ꢀ27 ЊईԪꢅꢀAC و
ꢇ，ꢇ ٧ᅷАŔ
ࣚ
ൺොꢋ៖ꢌᤚЖ⛾ꢢ✈ꢀTHD øӶࡈ
៖Ŕ ࣚ
ൺොꢋ៖ꢌ+ꢌŔ࿎Ћ。 Input Current
1.8
1.5
1.2
0.9
0.6
0.3
P : 90 W
O
Input Voltage: 90 VAC
PFC Inductor: 460 mH
CS Resistor: 0.15 W
0
0
0.0014 0.0028
0.0042 0.0056
0.0069 0.0083
Fixed On−time with THD Optimizer
Fixed On−time
ࣞ
27. Ԫꢟ AC و
ꢏ, ဆᣩ٬⛽ဆ
THD øӶꢄ
៖ᙱ٧ᅷ
АŔࣚ
ꢑො៖Ểᅂ www.onsemi.cn
14
FAN6921MR
V
RANGE ꢊꢋ
ᨙᕎꢀV MOSFET 。ᚵͥꢉꢀMOSFET Ŕ⃯ᥡჵꢠᖅೃ
ZCD
ꢀիꢀၓොꢋ͓ឍͥਾĮի
VIN
10 V
RANGE ჵꢠ。
ࣞ
ꢀ28 ЊꢀV ꢀիꢀၓ٬
ꢀRANGE VIN
ꢡᑷꢀ(რꢥᖅऐ) Ŕ⒖ᇡᣒꢜ。
2.1 V
1.75 V
RANGE = Ground
V
DS
t
PFCVO
V
RANGE = Open
V
IN.MAX
V
VIN
V
VIN−RANGE−L
VIN−RANGE−H
ࣞ
28. RANGE ჵ௪٬
VIN ჵ௪ꢁի+Ŕ₾ࢾ
ጜ t
PFC
Gate
ꢁꢌꢍꢎꢏꢐ(ZCD ꢊꢋ)
Inhibit
Time
ࣞ
ꢀ29 Њꢓꢀἡ᪠ἫŔͥꢉꢀꢥ。᪠Ἣѿꢖ᠏ꢋꢒ ᪠ἫꢀPFC ꢀዿ
ࡈ
ᩕ҉থꢃǁ᥅ൾ▐Ŕ。֢ᒑࣞ
ꢀ30, ᄳꢀPFC MOS ͓ឍ៖, PFC ꢀዿꢇസʈŔꢖꢊრ
ױ
ꢏ ϚᩍᲚ。⅟
ꢃnꢀPFC ꢀዿࡈ
⛾ඤ⛿ꢀ⛿ꢂ ᔏ, PFC MOS Ŕ⃯ᥡꢀիრℝĮ。ꢁំꢀZCD ჵꢠꢀ
իĮnꢔֱꢀիꢀ(1.75 V ͘५Ȝ) , ฑͭᴁֱꢀPFC ᧥
ᥡǁ
ח
, რꢁꢅថŔრ͓و
。 ୢꢃnტဘ⒖Ε⇐ᑑꢇឍꢀPFC ꢛꢐ, ლᙾ෦ꢀZCD
ჵꢠᒩĮೃꢁꢅĮnꢀ0.2 V (͘५Ȝ) Ŕꢀի, ®ꢈ↠Ἓꢀ
PFC ё✈ѿꢖ, ȼᵂ PFC რ͓ꢛꢐ。
t
ࣞ
30. PFC ⇆ꢁἡ᪠ἫꢈꢉỂᅂ PFC ॷꢁᢿꢇᒄ
PFC ꢂꢑꢌꢒ UVP ꢇ OVP（INV ꢊꢋ）
FAN6921MR ꢄꢀPFC ॷꢀꢥᖰŻૺҝƽᒄѿꢖꢀPFC
ꢏϚꢒ
ի٬ᴀի
ƽᒄෙꢀPFC ॷꢀꢥ∮ဘᲝᑑ。ꢆध ꢃꢀINV ჵꢠ
ꢀի᪠Ἣ٬̾ൺ
, ୢࣞ
ꢀ31 ᐠЊ。ᄳꢀINV ჵꢠꢀիꢃnϛՏტဘ⒖Εꢀnꢀ2.75 V Įn
0.45 V ၖ✄ƽᒄზ៖ꢌᓡঽॶꢀ70 ms, ú↠ἛꢀOVP
UVP ꢀꢥ, ֛ՓঘᵂꢀPFC რ͓ꢛꢐ。
INV ჵꢠ⛽¥✈n
ᖅ٬
ꢍꢎꢀPFC ꢏϚꢀի, ꢈ✄ ꢞꢖᖰŻꢀPFC ꢏϚꢀOVP/ UVP ƽᒄ。ईᜥⅬᰁჯἫᚥ
ꢇ, ୢϚ▐ჵꢠਾ, ᚵჵꢠ
͓ឍꢀPFC რ͓ꢒӛ。 ꢄfꢡᵂᩋᩍ⒖Ε⛻Ϛ▐ꢒꢀŔრ͓⍡╧，ꢢ✈ꢁ
៖ꢌ。Փş᪠Ἣ
ꢅͥਾŔᑱЖꢇ៖
ࡈ
᥅℠Жᣠ෯ꢀt OFF
АꢀZCD ǁ
ח
，ईᑱЖ៖ꢌͥꢀ(2.5 ms, ͘५Ȝ) ?⛽ú ֱ PFC ᧥ᥡǁ
ח
。 1.4 V
PFC Gate
Driver
Q
R
0.2 V
ZCD
V
AC
S
5
1.75 V
R
ZCD
L
b
2.1 V
S
10 V
1:n
Q R
PFC Gate On
FAN6921
ࣞ
29. ꢏ᮸⇆ꢁἡ᪠Ἣᰁष www.onsemi.cn
15
FAN6921MR
PFC V
O
1.3 V (͘५Ȝ) ၖ✄ꢀV ͭᴁАොꢋꢀի, ᐭúֱ
PWM
٬
PFC ᧥ᥡǁח
。 DD
Debounce
Time
Driver
ꢋꢀ/ᕩꢀƽᒄἫᅷỂᅂୢ
ࣞ
34 ᐠЊ。 V
REF
(2.5 V)
R
1
V
COMP
COMP
INV
2
C
O
Voltage
1
Error
Amplifier
Detector
AC Input
R
2
C
COMP
OVP = (V
UVP = (V
≥ 2.75 V)
≤ 0.45 V)
INV
INV
V
COMP−BO
FAN6921
V
COMP
1.6 V
ࣞ
31. ꢏ᮸ PFC ᪗ի٬
ᴀիꢇᒄᰁष V
VIN
PFC ꢓꢔꢃꢍꢐ(CSPFC ꢊꢋ)
V
V
INV−RE−UVP
ईꢀPFC ॷრ͓ꢛꢐꢌ, PFC რ͓ꢀἡꢃꢀCSPFC ჵ
ꢠ⛺Ŕꢀἡ᪠Ἣꢀꢡ᪠Ἣ, ၖ✄ᚵꢀꢡ⛺Ŕ᪠Ἣꢀի
፻Āꢏೃᶴᩓ
ࡈ
Ŕꢏֿͅര, ⛾⃘Ȝꢀիꢀ0.82 V (͘५ Ȝ) ꢕꢐᶴᩓ。ꢁំꢀCSPFC ჵꢠꢀիꢀn⃘Ȝꢀի,
PFC ᧥ᥡ֛Փ͓ឍ。
0 V
2.5 V
INV−BO
V
INV
1.2 V
PFC ໐Ȝრ͓ꢀἡ
ꢃꢀἡ᪠Ἣꢀꢡࡈ
ꢍꢎ。ࣞ
ꢀ32 ЊꢀPFC
᧥ᥡ٬
CSPFC ჵꢠꢀիŔἫᅷỂᅂ。 OPWM
OPFC
PFC MOS Current Limit
0.82V
CSPFC
OPFC
Brownout
Protection
Hiccup
Brownout
Protection
Debounce
Time 100 ms
Mode
ࣞ
33. ꢁ/ᕩꢁꢇᒄꢈꢉỂᅂ VDD
VDD Hiccup Mode
Brownout
AC Input
Brown−In
ࣞ
32. و
℠ἡ ꢄꢌ/ꢕꢌꢖꢗꢐ(VIN ꢊꢋ)
ꢋꢒꢀAC ꢀի᪠Ἣ, FAN6921MR
Åൾ▐ꢋꢀ/ᕩ ꢀƽᒄꢀ(AC ꢀիꢀUVP) 。
ࣞ
ꢀ33 Њꢋꢀ/ᕩꢀƽᒄŔ ͓῾࿅ļỂᅂ。ꢆधꢢ✈ꢀVIN ჵꢠ᥅᪠ἫꢀAC ꢏͅ
ꢀիꢀၓ, ၖ✄ꢀVIN ჵꢠꢋꢒꢀꢡϦի
ࡈ
ᖅೃꢀAC OPWM
OPFC
ꢏͅꢀ(֢ᒑ
ࣞ
ꢀ1); ࣀ
ᵄ, V ꢀի⛾ꢀAC ꢏͅꢀիᏰᵃ
VIN
ᶴꢀᄳꢀAC ꢀի⛻ℝ, ၖ✄ꢀV
ꢀիĮnꢀ1 V Ŕ៖ꢌᓡ
VIN
ঽꢀ100 ms, ú↠ἛꢀUVP ƽᒄၖ✄ꢀCOMP ჵꢠꢀի፻
٭
ĭnଇॶꢀ1.6 V 。ꢃnꢀPFC ᧥ᥡՀՊᶴꢋꢒᶴᩓ ̿
Ểᅂ٬
ꢀCOMP ჵꢠꢀի̾ൺ, ᩓĮŔꢀCOMP ꢀիú ොೄᩓʽŔꢀPFC ොꢋ៖ꢌ,
ࣀ
ᵄପꢁŔꢖꢊᣩ℠ၖ✄ PFC ꢏϚꢀիℝĮ。ᄳꢀINV ჵꢠꢀիĮnꢀ1.2 V,
FAN6921MR ֛ՓঘᵂꢁϧꢀPFC
٬
ꢀPWM რ͓ꢛꢐ, DŽ ࣞ
34. ꢁ/ᕩꢁꢇᒄἫᅷỂᅂꢞ(ᰝꢄၴ✈) PWM ॷ
HV ꢘꢙꢇꢚꢛꢌꢍ（HV ꢊꢋ）
HV ჵꢠꢋꢒꢁꢅꢀꢡᖅೃꢀAC ꢜꢥꢀ(֢ᒑ
ࣞ
ꢀ1) 。 ꢋꢒꢁꢅͥਾŔꢀի؏҈ꢀꢥ, ᄳឝҀꢀAC ꢀիАꢀ⁰
ೃꢀV ꢀիᢜೃ͓ឍꢀի⌖
ͭᴁԧೃොꢋꢀի DD
(UVLO)。
ߋ
ꢗ៖, FAN6921MR ᖰŻꢁꢅꢀꢀἡױ
ꢉꢀV ꢀ
DD
↠Ἓᕩꢀƽᒄ
, ᐠᣩრ͓ꢛꢐᯍ፻͓ឍ, V ꢀի DD
ꢀիꢀnꢀ
ࡈ
̥ꢀ, ®ꢈ৹ʽᖇЖࡈ
Ŕ؏҈៖ꢌၖईꢈҢͥᖰ ꢕͅᐳ
ᰁჯ, ᓡঽ⛺⛻Ể҈。ꢁDŽАꢀV VIN
www.onsemi.cn
16
FAN6921MR
ꢀА᧧Φ⍭ൺꢏϚꢀի。ꢄfίѿ૧, ईꢀV ꢀի
ᡕꢒොꢋꢀիၖꢕͅᵃဘꢛꢐ
, ᚵꢀի؏҈ꢀꢥú FAN6921MR
Å৹ʽೃꢀ2.25 ms t ꢄ 440 Hz Ŕრ͓⍡╧。
៖ꢌ, ᵄ៖ଇॶ
OFF
DD
፻͓ឍ, ®ꢈꢉ؏҈ꢀꢡ⛿ѿ૧。
֢ᒑ
ࣞ
ꢀ1 ٬
ࣞ
ꢀ2, FB ჵꢠꢀի⛽¥✈nᖅᴁॷ֭ ǁ
ח
Å̾ൺ᧥ᥡොꢋ៖ꢌ, ꢞ
✈n̾ൺꢀPFC ॷꢀ ꢥŔොꢋ͓ឍ⒖ᇡ。ईՊᩍᩋᩍÖ⛻, ୢꢀPF
C ॷꢀꢥꢆਾꢄ͓ឍ,
ÅίꢀPFC ॷრ͓ࡈ
ÖŔѿ ૧ၖᖰꢀᨼᕂᜨ╧。ᄳꢏϚᩍί
, FB ჵꢠꢀի ℝĮ,
ࣀ
ᵄ, FAN6921MR
ÅᨙᕎꢀFB ჵꢠꢀի᪠Ἣꢏ ϚᩍȜ, ®ꢈᖇЖ PFC ꢉϦŔොꢋ/͓ឍ⒖ᇡ。
ࣞ
ꢀ35 ЊꢀV ꢀի٬࿅
ļꢀἡꢀI Ŕᅡᣒꢜ。 DD
DD
ᄳꢀV ꢀիĮnꢀV
, FAN6921MR ঘᵂꢁ
DD−PWM−OFF
DD
ϧრ͓ꢛꢐၖ͓ឍᦰꢊͥꢉ⛽ᆥᑑŔꢀꢥ, ®ꢈℝĮ
࿅ļꢀἡ。᪩ᨗꢋ, ®ꢀV АꢀV Ŕ៖
DD−PWM−OFF
DD−OFF
ꢌúზ⁏, ᐳ
ᰁჯ⍡╧úℝĮ, ®ꢈℝĮꢏϚʽꢥ⒖ Ε⛻Ŕꢏͅѿ╧。
ࣞ
ꢀ36 Њᐳ
ᰁჯꢛꢐꢇꢀV ի٬᧥ᥡ
ǁח
Ŕ͘५Ểᅂ。 ꢀ
DD
t
OFF−MIN
I
DD
2.25 ms
I
DD−OP
PFC ON
PFC OFF
I
DD−PWM−OFF
37 ms
8 ms
V
CTL−PFC−ON
I
V
DD−ST
CTL−PFC−OFF
V
DD
V
V
V
DD−OFF DD−PWM−OFF
DD−ON
1.15 V (V
2.1 V (V
N)
G)
ࣞ
35. VDD ⛾ IDD−OP ᅡᣒএ ࣞ
37. VFB ꢁի⛾ tOFF−MIN ៖ᅡᣒএ V
DD−ON
Ểꢆꢎꢏ（DET ꢊꢋ）
ᄳꢀFAN6921MR Åꢙꢚᰁჯꢛꢐ៖, t
ꢙꢚᰁჯꢀꢥᨙᕎꢀFB ჵꢠꢀիꢀၓ̾ൺ。t
I
DD−OP
៖ꢌꢃ
OFF−MIN
V
V
DD−PWM−OFF
OFF−MIN
៖ꢌ
, ͥꢉỂꢘ᪠Ἣꢀꢥ፻↠Ἓ。ईꢀPWM რ͓ꢀt OFF
DD−OFF
៖ꢌͥ, ᄳָի
ࡈ
ꢀዿꢀἡꢀೃꢓ៖, PWM რ͓Ŕ ָի
ࡈ
ꢀዿ٬ඤ⛿ꢀრ
៖ꢂᔏ。ᄳꢀPWM რ͓ I
I
DD−PWM−OFF DD−ST
Ŕ⃯ᥡꢀիℝĮ៖, ᩕ҉থꢃꢀիꢀV
?⅟+⛻ℝ,
AUX
᪩᠏
ࣀ
ꢄᩕ҉থꢃ⛾ϽॷথꢃᏰר
⒖ᇡ。ꢁំ V
ꢀիꢂᔏၖℝೃꢀի, V ꢀիฑꢃꢀDET
AUX
DET
ࣞ
36. ᐳ
ᰁჯꢃጜꢠ VDDꢞꢁ
ի٬
᧥ᥡꢃꢆŔꢍꢎỂᅂ ჵꢠꢕꢐ
٭
ĭꢀ(֢ࣞ
ꢀ38) ၖ✄ᄚЖꢀFAN6921MR ꢏϚ ꢀἡꢀI 。FAN6921MR ֭᠀ၖᶴᩓᚵꢀI ꢀἡ。ୢ
DET
DET
ᚵ⁰ꢀἡ⛺ԧೃ⃘Ȝꢀἡ, ई
ࣚ
ൺზ៖ꢌꢀ(200 ns, ͘५Ȝ)
ֱ PWM ᧥ᥡǁח
。 ꢜꢝᰁჯꢅጜꢇ PFC ොꢄ/͓ឍᖇЖ（FB ꢊꢋ）
ꢢ✈ꢙꢚᰁჯᤚЖ᥅ꢕꢁᵅί
ߋ
ꢗꢇŔѿ૧ꢀ(ୢ რ͓ᔿ૧) 。ൣꢢ✈ҋꢜꢍЖᑠᤏ, ᨙᕎꢀFB ჵꢠꢀի
ꢍꢎრ͓⍡╧。ᄳꢏϚᩍί෯៖, ꢃnᴁॷ֭ꢛ
҈, FB ꢀիრ͓⃯ᥡꢀիỂꢘ。ᄳ᪠ἫАỂꢘǁ
ח
, FAN6921MR ꢏϚꢀPWM ᧥ᥡǁ
ח
, ®ꢈොꢋრ͓ၖრ ꢁꢅថŔრ͓
و
。 Auxiliary
Winding
+
DET
R
R
DET
V
10
AUX
+
ℝĮ, t
ზ⁏。ᄳꢀt
(ꢃꢀFB ꢀի̾ൺ)
0.3 V
OFF−MIN
OFF−MIN
V
DET
A
I
DET
, ͥꢉỂꢘ᪠Ἣꢀꢥ፻↠Ἓ, ✈n᪠ἫꢀPWM ꢋꢒᩋ ᩍÖ⛻Ŕꢙꢚᰁჯꢛꢐ
٬Ể
ꢘ᪠Ἣ, ꢀ⁰ߋ
ꢗꢖ૿ ზ⁏ꢀDCM ꢛꢐᰁჯ⛻ŔỂꢘრ͓, ၖꢖ૿ꢕꢁᵅί
რ͓ᔿ૧, ®ꢈൾ▐ᣔœᅷᨼᕂᜨ╧。FB ჵꢠꢀի⛾ꢀ
tOFF−MIN ៖ꢌᅡᣒꢜୢ
ࣞ
ꢀ37 ᐠЊ。ୢࣞ
ꢀ37 ᐠЊ, −
FAN6921
−
ࣞ
38. Ểᜇ᪠Ἣ www.onsemi.cn
17
FAN6921MR
ࣞ
39. Ểᜇ᪠ἫἫᅷỂᅂ ࣞ
40. VAUX ⛾ VIN +Ŕ͓ߋ
ꢇ/Įএꢈꢌꢒꢉѿ╧ጵɟ（DET ꢊꢋ）
ꢋဘ᥅ᛄ, ᄳѿ╧რ͓͓ឍ៖, ®᧥ᥡǁ
ח
⛻ℝ᪉২ Аѿ╧რ͓͓ឍസईꢁꢅზ៖ꢌ。ᚵზ᠏
ࣀ
ꢄ 900
800
PWM რ͓᧥ᥡꢀꢡ
٬᧥⁰ᥡꢀ
ꢀC ꢈꢃᖇЖࡈ
Ŕ ISS
ͥꢉĀꢏზ
٬
ꢀPWM რ͓Ŕ͓ឍზ៖ꢌ⛿Ŕ。 ई⛽
ŔꢀAC ꢏͅꢀի⛻, ईꢀPWM ꢀἡ℠ȜLj
៖, ᚵზ៖ꢌ⛿⛽
ŔᣠଇꢏϚѿ╧。ꢏͅꢀիᡚꢀ, ⛿ŔᣠଇꢏϚѿ╧ᡚꢀ，᪩᠏
ࣀ
ꢄឝҀАϽॷথꢃ ⛺Ŕꢀիᩓꢀ, ၖ✄ොೄᩓꢀŔ⛺ԧ╧ꢀዿꢀἡ。
ईLj
Ŕზ៖ꢌͥ, ú⛿ᩓꢀŔ໐Ȝꢀዿꢀἡ。 ׆
, ईꢏϚѿ╧Lj
៖, ꢀիꢜꢥ⛺Ŕ໐Ȝრ͓ꢀἡ ĮnĮիꢜꢥ。
ࣀ
ᵄ, ꢄfşᣠଇꢏϚѿ╧ई⛽
ꢏ ͅꢀի⛻ᶴᩓᖅ᪡, ᖇЖ
ࡈ
⇐ᑑꢍꢎꢀCSPWM ჵꢠŔ 700
600
500
400
300
V
LIMIT
ꢀի, ✈nᖇЖ PWM რ͓ꢀἡ。
0
100
200
I
300
(mA)
400
500
600
֢ᒑ
ࣞ
ꢀ40, ईꢀPWM რ͓ꢀt ៖ꢌͥ, ꢏͅꢀի፻ឝ ON
DET
ҀАϽॷথꢃၖ✄ᩕ҉থꢃꢀիꢀV
⛾Ͻॷথꢃꢀ
AUX
իᏰᵃᶴ。
ࣀ
ᵄ⅟Ȑꢏͅꢀիԧꢀ, ᩕ҉থꢃ֭ꢀ իꢀV ?⅟Ȑԧꢀ。FAN6921MR ꢞෙꢀDET ჵꢠꢀ
ࣞ
41. IDET ꢁἡ⛾ VLIMIT ꢁիᅡᣒএ AUX
իꢕꢐ
٭
ĭ, ၖꢏϚꢀἡꢀI 。ꢃnꢀἡꢀI ⅟
DET
DET
ЭẟὨꢊ (LEB)
V
ꢀիָӶ,
ࣀ
ᵄꢀFAN6921MR
ईꢀt ៖ꢌͥꢌ AUX
on
ᄳꢀPFC ꢀPWM რ͓ොꢋ៖, ꢃnꢏϚꢎᥡ
ٱ
֭ױ
ቂ૭ꢖꢊ
٬ѿ╧
ꢀMOSFET COSS ⛿Ŕꢏꢐᅑڭ
úई ꢀἡ᪠Ἣꢀꢡ⛺ዿၴꢁꢅꢀի໐。ꢄfꢡᵂᚵ໐
Ŕᅑ
ڭ
, FAN6921MR ꢇͥਾꢁꢅЭẟὨⅠ៖ꢌ, ၖᖈ ภईꢀCSPWM ჵꢠ
٬
ꢀGND +ꢌᖅꢁꢅ෯५ꢀRC Ể
ࡈ
ꢀ(ୢꢀ100 W, 470 pF) 。 ᠦᚵꢀἡꢀI , ®ꢈꢍꢎꢀPWM რ͓Ŕꢀἡ℠Ȝ, ൾ▐
DET
ꢀ/Įꢜꢥꢒѿ╧ꢝɟ。
⅟Ȑꢏͅꢀիԧꢀ, ᩕ҉থꢃꢀV ꢀŔ֭ꢀի?⅟
AUX
ȐꢀἡꢀI
ᩓĮŔꢀၓ。
ԧꢀ, ၖ✄ᖇЖ
ࡈ
෦ꢀVLIMIT ꢍꢎАꢁꢅ DET
R
DET
ꢀꢡ®ᩕ҉থꢃᖅೃꢀDET ჵꢠ。࿅ӛꢍ
ظ
ÅꢍꢎᚵꢀR ꢀꢡ, Åງᅷᢃꢀ⁰
ߋ
ꢗ⇐ᑑŔר
DET
PWM ॷꢁᢿꢇᒄ
ꢨꢀV
ꢀի。CSPWM ჵꢠꢀI
ꢀἡ⛾ꢀV
DET LIMIT
LIMIT
VDD ꢊꢋꢉꢒꢖꢗ(OVP)
ꢀիŔᅡᣒꢜୢ
ࣞ
41 ᐠЊ。 V
DD
ꢒիƽᒄѿꢖ✈nℂᵂꢀV ꢀիꢀn
ࡈ
Öၴѻ DD
I
DET + [VIN (NAńNP)]ńRDET
(eq. 1)
⍭ൺꢀի៖
ࡈ
Ö፻ᔿय。ईꢀV OVP እΕ⛻, ᖇЖࡈ
DD
֛Փঘᵂꢁϧრ͓ꢛꢐ, ၖꢕͅꢦꢧ͓ឍᰁჯ, DŽೃឍ
რꢀAC ᖲଔꢀ。
͖ꢇ, V ꢄꢏͅꢀի; N ꢄᩕ҉থꢃӽᝐ; NP ꢄϽॷ
IN
থꢃӽᝐ。
A
www.onsemi.cn
18
FAN6921MR
PWM
Gate
ᛓŔꢉꢞꢖꢗꢇꢋꢌꢍᒶֱ（RT ꢊꢋ） ࣞ
ꢀ42 ᠏ဆᣩꢀRT ჵꢠͥꢉᰁषŔ͘५ၴ✈ꢀꢥ。ୢ ࣞ
ᐠЊ, RT ჵꢠꢏϚሲἡꢀIRT, ࣀ
ᵄ
ÅງᅷꢀRT ჵꢠ ⛺ŔꢀիꢀVRT, ՓꢀIRT ꢀἡꢑÅꢀꢡ（ꢃꢀNTC ꢀꢡ
٬
ꢀ RA ꢀꢡꢃᏰ）。ୢꢀRT ჵꢠꢀիĮnꢀ0.8 Vၖ✄ᓡ
ঽ៖ꢌꢄƽᒄზ៖ꢌ, ú↠Ἓꢦꢧᰁჯၖঘᵂꢁϧ
PFC
٬
PWM რ͓ꢛꢐ。 t
NA
NS
RT ჵꢠꢋဘ✈nꢋꢒꢀNTC ꢀꢡൾ▐ꢒꢁƽᒄ, ၖෙ
͖ൣƽᒄѿꢖᖰŻꢉꢦꢧꢔֱ。࿅ӛꢍ
ظ
Åꢢ✈ ꢁꢅꢉꢔֱꢀꢥꢀ(ୢᡖꢒ
ٱ
) ᥅ᒩĮꢀRT ჵꢠၖ↠Ἓ ᖇЖ
ࡈ
ꢦꢧᰁჯ。 VO
@
V
AUX
ꢋဘ, ꢃnꢉꢦꢧꢔֱꢋဘ✈nტဘ⒖Ε⛻ƽᒄꢀ
⁰
ߋ
ꢗ, ൣ⇐ᑑᇋꢪ↠Ἓ。ࣀ
ᵄ, ꢁំꢀRT ჵꢠꢀիĮ nꢀ0.5 V, RT ჵꢠŔƽᒄሇꢄᑶ៖ꢌꢆਾꢄଇॶ
110 ms。
ෙnꢒꢁƽᒄ, ꢃnꢁႆ⛽ꢖ֛Փָ,
ࣀ
ᵄꢀRT ჵ ꢠꢀի?᠏ꢫፂℝĮ。
ꢍꢎꢀOTP Ŕꢄᑶ៖ꢌ⛽⇐ᑑ ᇋꢪ
ڭ
ၴ。ꢄfℂᵂꢀRT ჵꢠꢃnގ
̾ἫᚥÖꢀ(ୢ⍇ Ἣᚥ) Ϛ▐⛽ቐᄳŔꢦꢧꢔֱ, ᄳꢀRT ჵꢠꢔֱꢀի
ꢀnꢀ0.5 V ៖, ƽᒄሇꢄᑶ៖ꢌ፻ꢆਾꢄଇॶꢀ10 ms。
ꢄfꢉꢀRTꢀჵꢠ⛽ቐᄳŔꢔֱ, ლᙾΊҀꢁꢅ෯५ꢀ
ࡈ
ꢀ(ୢꢀ1000 pF), ⛾ꢀNTC ٬
ꢀRA ꢀꢡၖꢬ。 t
NA
NP
PFC_VO
@
NA
RA
VO
@
@
Sampling
here
NS RDET ) RA
V
DET
t
off
Blanking
FAN6921
Adjustable Over−
Temperature Protection &
External Latch Triggering
0.3 V
t
I
RT
= 100 mA
ࣞ
43. ᩣϚ᪗ի᪠ἫꢈꢉỂᅂ 12
Debounce
Time
0.8 V
0.5 V
Latched
RT
NTC
რ▏、ꢟꢈꢇꢉꢎꢖꢗ（FB ꢊꢋ）
110 ms
10 ms
R
RT
V
O
ࣞ
42.
ᛓ᪗ꢂꢇᒄ FB
ꢂꢑꢉꢒꢖꢗ（DET ꢊꢋ）
֢ᒑ
ࣞ
ꢀ43, ईꢀPWM ָիࡈ
ꢀዿࡈ
ꢀꢌ，ᩕ҉ থꢃꢀի®ᴁॷথꢃ֭ᅷА,
ࣀ
ᵄꢀDET ჵꢠŔԃൺ ꢀի⛾ꢏϚꢀիᏰᵃᶴ。FAN6921MR
Åईꢀt Ὠ
OFF
Open−Loop
Ⅰ៖ꢌ
ෙᚵԃൺꢀիꢀၓꢕꢐꢢᨗ, ®ꢈൾ▐ꢏϚ ꢒիƽᒄ。ᚵꢀt ὨⅠ៖ꢌ✈nᇝ5ꢀPWM ָի
ࡈ
⃯ Short−Circuit/Overload
OFF
ࣞ
44. FB ჵ௪რ▏、ʽᢿ٬
᪗ᩍꢇᒄ ꢀዿꢇŔꢀիᔏꢭ。ᚵꢢᨗԃൺꢀիꢀၓ⛾ͥꢉ⃘Ȝ
ꢀիꢀ2.5 V ꢕꢐᶴᩓ, ꢁំ↠Ἓƽᒄѿꢖ, FAN6921MR
ฑꢕͅꢦꢧᰁჯ。
ईꢏϚꢒիእΕ, ꢋꢒ᪩ҝꢮ
و
ꢢᨗយჯ, ᖇЖࡈ
Åൾ▐ᇋꢪƽᒄ。ƽᒄꢀիꢀၓ
ꢃꢉꢀꢡϦի ֢ᒑ
ࣞ
ꢀ44, ईꢀFAN6921MR ꢉ, FB ჵꢠᖅೃꢔꢀ
ࡈר
ᡖꢒٱ
Ŕꢁꢀᥡ。ईꢀFAN6921MR ͥꢉ, FB ჵ ꢠꢋꢒꢁꢅଇॶꢀ5 kWĂŔꢀꢡᖅೃͥꢉꢀիꢕਾ。
⅟ȐꢏϚᩍଇ, ꢏϚꢀիℝĮ, ၖ✄ϽॷƇꢔꢀ
ࡈר
ᡖꢒٱ
Ŕ∬ꢀἡί෯。ࣀ
ᵄ, FB ჵꢠꢀիࣀ
ͥ ꢉꢀիꢕਾꢈԧꢀ。ईრ▏、ꢏϚʽꢥꢒᩍÖ⛻,
ᚵ∬ꢀἡꢕꢁᵅί෯ၖ✄ꢀFB ჵꢠꢀիꢃͥꢉꢕਾꢀ
ࡈ
ꢀR ٬
ꢀR Ŕᶴꢓ̾ൺ。DET ჵꢠŔၓԃꢀի
A
DET
ÅꢯꢄÅ⛻យӛჯ:
RA
V
DET + (NAńNS) VO
(eq. 2)
R
DET ) RA
www.onsemi.cn
19
FAN6921MR
իᒩೃꢀꢀၓ。ᄳꢀFB ჵꢠꢀիꢀnꢀ4.2 V Ŕ៖ꢌА
50 ms,ꢀú↠Ἓ FB ჵꢠƽᒄ。
ꢀիАොꢋꢀի。ईꢏϚꢀի⛺ԧА⍭ൺꢀիၖ®
ᩕ҉থꢃ
ױ
ꢀV ꢀࡈ
Āꢏꢖꢊ+Э, ᚵƽᓡꢀࡈ
DD
ᆥꢰꢱᓡꢛꢐᐠ⇐ŔꢀV ꢀիꢖꢊ。ᄳꢀV ꢀի
DD
DD
VCC ꢠꢒꢍꢡ（UVLO, VDD ꢊꢋ）
֢ᒑ
ࣞ
ꢀ35 ٬
ࣞ
ꢀ36, FAN6921MR Ŕොꢋ٬
͓ឍꢀV Аොꢋꢀի, ୢईꢀV ꢀիᢜೃ͓ឍꢀի
DD
DD
V
Эᤊꢔֱƽᒄѿꢖ, FAN6921MR რ
DD−PWM−OFF
ᐠᣩრ͓ꢛꢐ。
⃘ȜꢀիϦЋ
ࣚ
ൺईꢀ18 V ٬
ꢀ10 V。ई؏҈ꢌ, ƽᓡ ꢀ
ࡈ
ꢀ(V ꢀࡈ
) ꢃꢀHV ؏҈ꢀἡ̥ꢀ, DŽೃꢀV DD
DD
www.onsemi.cn
20
MECHANICAL CASE OUTLINE
PACKAGE DIMENSIONS
SOIC−16, 150 mils
CASE 751BG−01
ISSUE O
DATE 19 DEC 2008
SYMBOL
MIN
NOM
MAX
1.35
A
A1
b
1.75
0.25
0.51
0.25
0.10
0.33
0.19
c
D
E
E1
e
9.80
5.80
3.80
9.90
6.00
10.00
6.20
4.00
E1
E
3.90
1.27 BSC
h
0.25
0.40
0º
0.50
1.27
8º
L
θ
PIN#1 IDENTIFICATION
TOP VIEW
D
h
q
A
c
e
b
L
A1
END VIEW
SIDE VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-012.
Electronic versions are uncontrolled except when accessed directly from the Document Repository.
Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.
DOCUMENT NUMBER:
DESCRIPTION:
98AON34275E
SOIC−16, 150 MILS
PAGE 1 OF 1
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