FAN6921MLMY [ONSEMI]
mWSaver™ 功率因数控制器 (PFC) CrCM + QR PWM 控制器，欠电压保护;
| 型号： | FAN6921MLMY |
| 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21页 (文件大小：1220K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATA SHEET
www.onsemi.cn
↖ᏰჯꢀꢀᰁჯꢀPFC/ꢁᛠᔏꢁἡ
ᰁჯ PWM ᖇꢂ
SOIC−16, 150 mils
CASE 751BG−01
FAN6921ML
ᛄ
ꢀႆꢁᏰŔ FAN6921MLꢀ෦ѿ╧
ࣀ
ᝐᨁᵃ (PFC)ꢀᖇЖࡈ
٬Φ
ꢂ ᔏ PWMꢀᖇЖ
ࡈ
ꢃר
ईꢁꢄ。ꢁᏰ⛽ĦᖰŻfꢀሇ×ᶴŔꢅ ꢆ，✄
Åί᮸̣ÖŔᝐᲟ。 MARKING DIAGRAM
ෙn PFC，FAN6921MLꢀş✈ַᖇො៖ᑠᤏ᥅ᖰŻᛓDŽ
ἡᩣϚꢀի，ᑇጜ⌖Ŕѿ╧
ࣀ
ᝐᨁᵃ。᪗ϻថŔ THDꢀøӶ ࡈ
，FAN6921ML
Åί᪗⇆ᒶֱŔᩣͅꢀἡǯ，᪫ THD ሇ்。
ZXYTT
FAN6921FO
TPM
ෙn PWM，FAN6921MLꢀǿ҉Ểᜇ᪠Ἣ、ൂᰁჯ᪠ጜ
٬
ꢀ/ Įএᢿꢀի᪗ѿ╧ጵɟ᥅ᄚꢀ⁰
ߋ
যሇ்。FAN6921MLꢀᖰ Ż：
ᴁॷֿრ▏٬
᪗ἡƽᒄ、᮸₹ῑᒶֱ、᪗ RTꢀჵ௪٬
Z
X
= Plant Code
= Year Code (1 Digit for SOP, 2 Digits for
DIP)
᮸ NTCꢀꢀℋൾ▐Ŕ
ᛓ᪗ꢁƽᒄ、ͥ᮸᪗ꢁ͓ឍ、V ꢀჵ௪ DD
OVP、✈nᩣϚ OVPꢀŔ DETꢀჵ௪᪗ի，Å֪✈n ACꢀᩣͅꢀ
իᴀիƽᒄ (UVP) Ŕꢀ/ᕩꢀ。
FAN6921ML ᖇЖ
ࡈ
Თ✈ 16-ჵ௪෯บෘ᎕ (SOP)。 Y
= Week Code (1 Digit for SOP, 2 Digits for
DIP)
= DIe−Run Code
TT
FAN6921 = Specific Device Code
F
O
T
P
M
= Frequency (M = Low, H = High Level)
ሇ
= OLP Mode (L = Latch, R = Recovery)
= Package Type (N = DIP, M = SOP)
= Y = Green Package
•ꢂꢁᏰჯ PFC
٬֭↠ჯᖇЖ
ࡈ
•ꢂꢃꢂᰁჯ PFC ᖇЖ
ࡈ
•ꢂPFC ॷŔ⇆ꢀἡ᪠Ἣ
•ꢂPWM ॷŔΦꢂᔏ᪠ጜ
= Manufacture Flow Code
•ꢂQR PWM ॷŔͥ᮸ᣠ෯Ȝ t
8 ꢀ s
OFF
ORDERING INFORMATION
•ꢂPWM Ŕͥ᮸ᨿ؏҈៖ꢄ 10 ms
•ꢂᴀիƽᒄ
See detailed ordering and shipping information on page 19 of
this data sheet.
•ꢂෙ PWM Ŕ H/L এᢿꢀի᪗ѿ╧ጵɟ
•ꢂ₹ῑƽᒄ (FB ჵ௪)
♦ꢂ᪗ѿ╧/᪗ᩍƽᒄ
♦ꢂʽᢿƽᒄ
♦ꢂრ▏ƽᒄ
•ꢂ᮸₹ῑᒶֱ (RT ჵ௪)
•ꢂ
ᛓ᪗ꢁ₹ῑ (RT ჵ௪) •ꢂVDD ჵ௪⛾ᩣϚꢀի OVP (₹ῑ)
•ꢂͥ᮸ꢁႆ͓ឍ (140°C)
• This is a Pb−Free Device
ၴ✈
•ꢂAC/DC NB ᰝ
ࡈ
•ꢂრᦖჯ SMPS
•ꢂꢀṀ̥ꢀ
ࡈ
© Semiconductor Components Industries, LLC, 2010
1
Publication Order Number:
January, 2023 − Rev. 2
FAN6921MLCN/D
FAN6921ML
ၴ✈ᨦꢃ
14
ZCD
6
4
3
1
16
RANGE
OPFC CSPFC
INV
HV
NC
15
13
9
VIN
FAN6921
8
5
GND
OPWM
CSPWM
COMP
RT
12
DET
10
VDD
FB
11
2
7
ꢃꢄ1.ꢄꢅꢆၴ✈
www.onsemi.cn
2
FAN6921ML
ꢇ᮸ᨦꢃ
COMP
HV
VDD
16
2
7
RANGE
Internal
Bias
Multi−Vector Amp.
RANGE
15
6
NC
2.65V
2.75V
OVP
IHV
OVP
Two Steps
UVLO
18V/10V/7.5V
2.75V
2.9V
27.5V
Latched
UVP
2.3V
DRV
Debounce
70ꢀ s
0.45V
SET
CLR
OPFC
S
R
Q
Q
15.5V
Latched
Brownout
INV
3
2.5V
Restarter
Sawtooth
Generator
/tON−MAX−PFC
THD
Optimizer
PFC Zero Current
Detector
2.1V/1.75V
Disable
Function
Inhibit
Timer
PFC
Current Limit
0.6V
0.2V
Blanking
Circuit
CSPFC
FB
4
11
5
VC & PFC ON/OFF &
Multi Vector Amp.
ON/OFF
Debounce
550ms / 150ꢀ s
VCTL−PFC−ON/OFF
ZCD
14
8
0.7V
10V
Timer
4.2V
2R
IZCD
50ms
VB
2.5ms
32.5ꢀ s
Soft−Start
9.5ms
FB OLP
Starter
DRV
R
SET
CLR
S
R
Q
Q
OPWM
Blanking
Circuit
17.5V
CSPWM
PWM
Current Limit
DET pin OVP
VDD pin OVP
Over Power
Compensation
IDET
Internal OTP
(RT Pin) Prog. OTP
Lathed
Protection
Brownout
Protection
(RT Pin) Externally Triggering
Output Short Circuit (FB
IDET
tOFF−MIN
(8us/37ꢀ s/2.5ms)
Latched
Valley
Detector
Pin)
Output Open−Loop (FB Pin)
tOFF−MIN
+9ꢀ s
1st Valley
Output Over Power/ Overload (FB Pin)
Startup
VC
Latched
VDET
tOFF
Blanking
(4ꢀ s)
S/H
1
RANGE
VB & clamp
COMP to 1.6V
Latched
V
Debounce
Time
2.5V
DET OVP
IRT
Debounce
100ms
1.2V
VINV
0.8V
0.5V
100uA
DET 10
0.8V VINV
0.3V
Brownout
comparator
IDET
Debounce
100ms
5V
1V/1.2V
100us
10ms
Internal
OTP
Latched
Prog. OTP
/ Externally Triggering
2.35V/2.15V
PFC RANGE Control
9
13
12
GND
RT
VIN
ꢃꢄ2.ꢄꢈ்ᨦꢃ
www.onsemi.cn
3
FAN6921ML
ჵ௪ᰝਾ
RANGE
COMP
INV
1
2
3
16
15
14
HV
N.C.
ZCD
CSPFC
CSPWM
OPFC
4
5
6
7
8
13
12
11
10
9
VIN
RT
FB
VDD
DET
GND
OPWM
ꢃꢄ3.ꢄჵ௪ᰝਾ
ჵ௪ꢉꢊ
ჵ௪ꢋ
1
ꢌӀ
ᛄ
RANGE RANGEꢀჵ௪Ŕꢀᑷꢁ VINꢀჵ௪ꢀիꢀၓָӶ。ᄳ VINꢀჵ௪᪠ἫАŔᩣͅꢀիĮnꢂȜꢀի，͖ᚎꢁ▨ꢀᑷ；ᄳᩣ
ͅꢀիꢁ▨ꢀၓ，͖ᚎꢁĮꢀᑷ。
2
COMP
ᚿ࿎ଇ
ࡈ
ŔᩣϚჵ௪。ൣ᠏ᢸො५ᚿ࿎ଇࡈ
，✈n PFCꢀᩣϚꢀի֭。ᚵଇࡈ
ͥਾ✃ᣩૺױ
Ჟꢀἡ；ࣀ
ᵄ， PFCꢀꢀի֭
ࢾ
ᢿጵɟ̡ᚈईᚵჵ௪٬
GNDꢀ+ᚎਾ⛰ꢂِԵŔጵɟꢀᢿൾ▐。 3
4
INV
ᚿ࿎ଇ
ࡈ
Ŕ֭Ljᩣͅჵ௪。ᚵჵ௪✈n᪗Ϧիࡈ
ᖅ PFC ꢀիꢀၓၖᖰŻ PFC ᩣϚ᪗ի٬ᴀի
ƽᒄ。 CSPFC ᖰŻ
و
℠ἡƽᒄŔ PFCꢀ᪗ἡƽᒄᶴᩓࡈ
Ŕᩣͅ。ᄳ PFCꢀꢀἡ᪠Ἣꢀꢀ⛺Ŕ᪠ἫꢀիАͥ᮸ꢂȜ (0.6 ͘५Ȝ) ៖，ᚵ PFC რ͓͓ឍÅ↠Ἓ
و
℠ἡ。 5
CSPWM PWMꢀ᪗ἡƽᒄᶴᩓ
ࡈ
Ŕᩣͅ，᪗ FBꢀჵ௪ꢀիൾ▐ PWMꢀꢀἡᰁჯᖇЖ。Თ✈⛰ꢂꢀꢀ᥅᪠Ἣ PWMꢀრ͓Ŕრ͓ ꢀἡ，ၖෙ CSPWMꢀჵ௪ឝҀ᪠Ἣꢀի，®ई PWM onꢀᨙᕎ DETꢀჵ௪⁰ꢀἡൾ▐
و
℠ἡ、ꢀἡᰁჯᖇ Ж
٬
▨/Įএᢿ᪗ѿ╧ጵɟ。 6
7
OPFC
VDD
ࣞ
᧑╁҈ࡈ
ᩣϚ
╁҈᮸ѿ╧ MOSFET。٭
ĭ᧥ᥡᩣϚꢀիꢁ 15.5 V。 ꢀ⁰。
؏҈٬
͓ឍŔꢂȜꢀիϦЋꢁ 18 V ٬
7.5 V。؏҈ꢀἡĮn 30 ꢀ A ၖ✄࿅ļꢀἡĮn 10 mA。 8
OPWM
ࣞ
᧑ᩣϚ
⛿ PWM ǁח
，✈Å╁҈᮸ѿ╧ MOSFET。٭
ĭ᧥ᥡᩣϚꢀիꢁ 17.5 V。 9
GND
DET
ѿ╧ऐ٬
ǁח
ऐ。 10
ꢁАÅ⛻ƾŔ，ᚵჵ௪
᪗⛰ꢂꢀꢀϦիࡈ
ᖅೃ PWM ָիࡈ
Ŕᩕ҉থঔ： •ꢃ⛿⛰ꢂȯӋꢀի，✈nጵɟ PWMꢀ℠ἡꢂȜꢀի，®ᖰŻ᪗ѿ╧ጵɟ。ᄳ PWMꢀრ͓ො៖，⛿ŔȯӋ⛾
ᩣͅꢀի⛰ೄ。
•ꢃ᪠Ἣ PWM რ͓⃯ᥡꢀիŔỂᜇꢀիǁ
ח
，ൾ▐Ểᜇꢀիრ͓ၖᣠଇӛႆऐί PWM რ͓Ŕრ͓ᔿ૧。 •ꢃᖰŻᩣϚ᪗իƽᒄ。ꢀիᶴᩓ
ࡈ
ͥਾnꢀDETꢀჵ௪ꢄ。DETꢀჵ௪᪗⛾ᩕ҉থঔၖତŔϦիࡈ
᪠Ἣԃൺꢀի。ई PWM ꢀዿ
ࡈ
ꢀ，ᚵԃൺꢀի፻֭Аᴁॷথঔ。ୢᩣϚ OVPꢀ٬ᚵԃൺꢀի
▨n 2.5 V，ᖇЖࡈ
᪫ͅꢃ ꢄᰁჯၖ✄ঘᵂ⛰ϧ PFC
٬
PWM რ͓ꢁጜ。 11
FB
֭ꢀիჵ௪。ᚵჵ௪✈nᖅᩣϚꢀիꢀၓǁ
ח
，®̾ൺ✈nᛓᩣϚꢀիŔ PWMꢀ᧥ᥡՀՊᶴ。ୢ FBꢀჵ ௪ꢀի▨nଇॶ 4.2 V ŔꢅȜꢀի៖ᡕ᪗ꢀ50 ms，FB ჵ௪ꢀի᪨
Å↠Ἓრ▏、᪗ᩍᩣϚʽᢿƽᒄ。ᚵჵ௪Ŕ ᩣͅꢀᑷ᠏⛰ꢂꢀ5 kꢁꢂŔؙᜨꢀꢀ。ईꢀFB
ჵ௪٬
ꢀCSPWM/FB ᶴᩓࡈ
ᩣͅ+ᖅ⛰ꢂꢀ1/3 Ŕፀίࡈ
。 12
13
14
RT
VIN
ZCD
ᛓŔ᪗ꢂƽᒄ٬᮸
ꢃꢄᒶֱ。RT ჵ௪ᩣϚሲἡ。ᄳꢀRT ჵ௪ꢀիĮnꢀ0.8 V (͘५Ȝ) ៖，ú↠Ἓꢃꢄᰁჯƽ ᒄ，ၖঘᵂ⛰ϧꢀPFC
٬
ꢀPWM რ͓ꢁጜ，DŽೃឍრꢀAC ᖲଔ。 ✈nꢀ/ᕩꢀƽᒄŔএᢿꢀի᪠Ἣ。ᚵჵ௪
Å᪗Ϧիࡈ
ᖅꢀAC ᩣͅꢀիꢀၓ。VIN ჵ௪Ŕꢀիꢀၓ⛽¥✈n ᖇЖꢀRANGE ჵ௪Ŕ⒖ᇡ，᪨
✈nൾ▐ꢀAC ᩣͅꢀիꢀUVP Ŕꢀ/ᕩꢀƽᒄ。 PFC ॷŔꢆꢀἡ᪠Ἣꢀᚵჵ௪ᖅೃ⛾ꢀPFC ꢀዿ
ࡈ
থঔꢃר
Ŕᩕ҉থঔ，✈nईꢀPFC ꢀዿࡈ
ꢀἡꢀೃꢆ៖᪠Ἣ ZCD ꢀիǁ
ח
。ᄳ᪠ἫА ZCD ꢀիǁח
៖，ᖇЖࡈ
რ⛰ꢂថŔ PFC რ͓و
。ᄳ ZCD ჵ௪ꢀի፻ᒩೃĮn 0.2 V (͘५Ȝ)ꢀ៖，ᚵჵ௪ё✈ PFCꢀॷꢀᢿၖ✄ᖇЖ
ࡈ
ȼᵂ PFCꢀრ͓ᚭļ。ୢꢇᑑё✈ FPC ॷꢀᢿ，
᪗⛰ ꢂ᮸ꢀᢿൾ▐。
15
16
NC
HV
ៀᖅ
▨ի؏҈。᪗⛰ꢂꢀꢀ (100 kꢁ，͘५Ȝ) ᖅೃ AC এᢿꢀի，®
ױ
VDD ꢀࡈ
ᖰŻଇ̥ꢀꢀἡ。 www.onsemi.cn
4
FAN6921ML
ভꢍᣠꢎ⍭ꢉꢏ
ꢋ ꢐᝐ
ᣠꢑꢏ
−
ᣠꢎꢏ
30
ꢒꢓ
V
V
DD
V
HV
ꢀ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
D
ѿ૧
mW
°C/W
°C/W
°C
°C
°C
V
ꢃ
⋍ꢀ (ণАՊᷴ)
−
104
JA
JC
ꢃ
⋍ꢀ (ণೃ)
−
41
T
࿅ļণꢂ
−40
−55
−
+150
+150
+260
4500
1250
J
T
STG
സʈꢂႆී
ࣔ
T
ჵ௪ꢂႆ，⋪ᖅ 10 Ң
L
ESD
−
ijᰁ५，JESD22-A114 (ꢈ HV ჵ௪Ŕᐠᣩჵ௪) (Ỉ 3)
̣Ö̥ꢀᰁ५，JESD22-C101 (ꢈ HV ჵ௪Ŕᐠᣩჵ௪) (Ỉ 3)
−
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)
ୢꢀիᡕ᪗ᣠଇꢉൺȜጸꢄϷϚŔȜී
ࣔ
，ࡈ
Ö
்úᔿय。ୢᡕ᪗Ûĵ᪩{℠Ȝ，෦ៀẵƽᚑࡈ
Öѿ்，
்úොೄࡈ
Öᔿय，ᅑڭ
ꢊሇ。 1. ඵիѻᡕ᪗ভෙᣠଇꢉൺȜꢄᐠϷŔᝐȜ，
்úࡈ
ÖᏰ⛽
ǎ૭Ŕᔿय。 2. ἫᅷŔᐠᣩꢀի，ꢈ࿎ᰁꢀի+，ᯍ֢⍇ GND ჵ௪。
3. ӥ
؋
HV ჵ௪ईͥŔᐠᣩჵ௪：CDM = 750 V，HBM = 1000 V。 ᖈภŔꢔꢕꢖ
ꢋ ꢐᝐ
ᣠꢑꢏ
ᣠꢎꢏ
ꢒꢓ
T
A
࿅ļ▏ꢂႆ
−40
+105
°C
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
ࣔ
ጸꢄᐠϷꢀի៖，⛽ƽᚑ்૿ᵃဘꢁጜ。ꢋ៖ईᖈภ࿅ļීࣔ
ጸꢄᒔൺීࣔ
ÅŔꢀի⛻ꢁጜ，
்úᅑࡈڭ
ÖŔ
ꢊሇ。 www.onsemi.cn
5
FAN6921ML
ꢁᷴሇ (ꢈꢌ
׆
ᣩᛄ，V = 15 V，T = -40~105°C (T = T )。) DD
A
A
J
ꢋ ᮸ꢗ
ꢐᝐ
ꢔꢕꢖ
ᣠꢑꢏ
ꢅꢆꢏ
ᣠꢎꢏ
ꢒꢓ
V
DD
V
ঽ࿅ļꢀի
−
16.5
9
−
18.0
10
25
19.5
11
V
V
OP
V
ොꢂȜꢀի
PWM ͓ឍꢂȜꢀի
͓ឍꢂȜꢀի
؏҈ꢀἡ
DD−ON
DD−PWM−OFF
V
V
V
6.5
−
7.5
10
8.5
20
V
DD−OFF
I
V
= V − 0.16 V,
DD−ON
ꢀ A
DD−ST
DD
᧥ᥡრᢿ
I
࿅ļꢀἡ
V
= 15 V, OPFC;
−
−
−
10
−
mA
mA
DD−OP
DD
OPWM = 100 kHz,
, C = 2 nF
C
L−PFC
L−PWM
I
ൂᰁჯ࿅ļꢀ⁰ꢀἡ (ၓध)
PWM ͓ឍ៖Ŕ࿅ļꢀἡ
V
DD
= 15 V,
5.5
DD−GREEN
OPWM = 450 Hz,
= 2 nF
C
L−PWM
I
V
= V − 0.5 V
DD−PWM−OFF
70
26.5
100
−
120
27.5
150
120
170
28.5
200
−
ꢀ A
V
DD−PWM−OFF
DD
DD
V
V
DD
V
DD
V
DD
᪗իƽᒄ (Latch-Off)
OVP ֛ᑶ៖
DD−OVP
t
ꢀ s
ꢀ A
VDD−OVP
I
OVP ꢃꢄრ؏ƽᒄꢀἡ
V
= 7.5 V
= 90 V
DD−LATCH
HV ꢘꢙꢁ⁰ꢁἡ᮸ꢗ
V
HV ჵ௪⛺Ŕᣠ෯؏҈ꢀի
᥅ HV ჵ௪Ŕꢀ⁰ꢀἡ
−
−
−
50
−
V
HV−MIN
I
V
AC
1.2
mA
HV
(V = 120 V), V = 0 V
DC
DD
HV = 500 V,
−
1.0
−
ꢀ
A
V
DD
= V
+1 V
DD−OFF
VIN ꢚ RANGE ᮸ꢗ
V
✈n AC ᩣͅᴀիƽᒄŔꢂȜꢀի
ᴀիƽᒄᲝਾꢀի (✈n؏҈)
0.95
1.00
1.05
V
V
VIN−UVP
V
V
V
V
VIN−UVP
VIN−RE−UVP
VIN−UVP
VIN−UVP
+ 0.15
+ 0.20
+ 0.25
t
ᴀիƽᒄ֛ᑶ៖ (ई؏҈/ᐳ
ᰁჯ⛻⛽ꢇᑑ) 70
2.30
2.10
70
100
2.35
2.15
100
−
130
2.40
2.20
130
0.5
ms
V
VIN−UVP
V
RANGE ᶴᩓ
ࡈ
Ŕ▨ V RANGE ᶴᩓ
ࡈ
ŔĮ V ꢂȜ
ꢂȜ
RANGE = ᖅऐ
RANGE = რᢿ
VIN−RANGE−H
VIN
VIN
V
V
VIN−RANGE−L
t
ී
ࣔ
؏✈/ё✈֛ᑶ៖ ms
V
RANGE
V
RANGE ჵ௪ŔᩣϚĮꢀի
PFC ᣠଇො៖
I
O
= 1 mA
−
RANGE−OL
t
22
25
28
ꢀ
s
ON−MAX−PFC
PFC ꢁᢿ
ꢁꢛᚿꢜꢎꢝ᮸ꢗ
Gm
ᢸො (Ỉ 4)
100
2.465
2.70
2.60
1.06
125
2.500
2.75
2.65
−
150
2.535
2.80
2.70
1.14
ꢀ
m
h
o
V
֭ᶴᩓ
ࡈ
֢ꢄꢀի ٭
ĭ▨֭ꢀի V
V
V
REF
V
INV−H
RANGE = რᢿ
RANGE = ᖅऐ
V
RATIO
٭
ĭ▨ᩣϚꢀիᶴū V
INVH
/ V
,
REF
RANGE = რᢿ
V
INVH
/ V ꢄ
REF
1.04
−
1.08
RANGE = ᖅऐ
V
٭
ĭĮ֭ꢀի 2.25
−
2.30
2.90
2.75
2.35
2.95
2.80
V
V
V
INV−L
INV ᩣͅŔ᪗ꢀիƽᒄ
RANGE = რᢿ
RANGE = ᖅऐ
V
INV−OVP
−
www.onsemi.cn
6
FAN6921ML
ꢁᷴሇ (ꢈꢌ
׆
ᣩᛄ，V = 15 V，T = -40~105°C (T = T )。) (continued) DD
A
A
J
ꢋ ꢐᝐ
ꢔꢕꢖ
ᣠꢑꢏ
ꢅꢆꢏ
ᣠꢎꢏ
ꢒꢓ
ꢁꢛᚿꢜꢎꢝ᮸ꢗ
t
᪗իƽᒄ֛ᑶ៖
INV ᩣͅŔᴀիƽᒄ
ᴀիƽᒄ֛ᑶ៖
50
0.35
50
70
0.45
70
90
0.55
90
ꢀ s
V
INV−OVP
V
INV−UVP
t
ꢀ s
V
INV−UVP
V
✈nꢀឍ FB ꢃꢄŔ INV ꢂȜꢀի
0.7
0.8
1.20
0.8
−
0.9
INV−FB−Latch
V
✈nᕩꢀƽᒄŔ PWM
٬
PFC ͓ឍꢂȜ 1.15
0.7
1.25
0.9
V
INV−BO
V
✈nᕩꢀƽᒄŔ PWM ͓ឍꢂȜꢀի，PFC ͓ឍ
ᶴᩓ
ࡈ
ᩣϚ▨ꢀի V
INV−BO2
V
COMP
4.8
6.0
V
V
COMP ჵ௪ꢆՀՊᶴꢀի
ᶴᩓ
ࡈ
ᩣϚ⁰ꢀἡ 1.15
15
1.25
25
1.35
35
V
OZ
I
V = 2.3 V,
INV
ꢀ A
COMP
V
COMP
= 1.5 V
V
= 1.5 V
0.50
20
0.75
30
1.00
40
mA
INV
ᶴᩓ
ࡈ
ᩣϚ∬ꢀἡ RANGE = რᢿ,
ꢀ A
V
INV
= 2.75 V,
V
COMP
= 5 V
RANGE = ᖅऐ,
20
30
40
ꢀ
A
V
INV
= 2.65 V,
V
COMP
= 5 V
PFC ꢁἡ᪠Ἣ᮸ꢗ
V
و
໐Ȝꢀἡ℠ЖŔꢂȜꢀի Āᚍზ
V
COMP
= 5 V
−
−
0.60
110
−
V
CSPFC
t
200
250
1.00
ns
ns
PD
t
ЭẟὨꢍ៖
110
0.90
180
0.95
BNK
A
V
THD Ŕ CSPFC ጵɟᶴū
PFC ᩣꢞ᮸ꢗ
V
PFC ᧥ᥡᩣϚ
٭
ĭꢀի PFC ᧥ᥡᩣϚꢀիĮꢀၓ
PFC ᧥ᥡᩣϚꢀի▨ꢀၓ
PFC ᧥ᥡᩣϚ⛺ԧ៖
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,
30
65
100
ns
L
20~80%
t
F
PFC ᧥ᥡᩣϚ⛻ꢎ៖
V
= 12 V, C = 3 nF,
30
50
70
ns
DD
L
80~20%
PFC ⇆ꢁἡ᪠Ἣ᮸ꢗ
V
ᩣͅꢂȜꢀի⛺ԧẟ
ꢂȜꢀի₾
ࢾ
V
V
⛺ԧ
⛻ꢎ
1.9
0.25
8
2.1
0.35
10
2.3
0.45
−
V
V
ZCD
ZCD−HYST
ZCD
V
ZCD
V
٭
ĭꢀի⛺℠ I
I
I
= 3 mA
V
ZCD−HIGH
ZCD
ZCD
ZCD
V
٭
ĭꢀի⛻℠ = −1.5 mA
= 5 ꢀ A
0.55
0.8
0.70
0.9
−
0.85
1.0
V
ZCD−LOW
V
რ⁰ꢀἡꢂȜꢀի
®ꢆꢀἡ᪠ἫАᩣϚොŔᣠଇზ
Ო؏៖
V
ZCD−SSC
t
V
V
V
= 5 V, f = 60 kHz
100
300
1.5
200
700
3.5
ns
ꢀ s
ꢀ s
mV
ꢀ s
DELAY
RESTART−PFC
COMP
S
t
500
2.5
200
150
t
ᑱЖ៖ (ᣠଇრ͓ꢏ╧℠Ж)
PFC ؏✈/ё✈ѿ்ꢂȜꢀի
PFC ؏✈/ё✈ѿ்֛ᑶ៖
= 5 V
INHIB
COMP
V
150
100
250
200
ZCD−DIS
ZCD−DIS
t
= 100 mV
ZCD
www.onsemi.cn
7
FAN6921ML
ꢁᷴሇ (ꢈꢌ
׆
ᣩᛄ，V = 15 V，T = -40~105°C (T = T )。) (continued) DD
A
A
J
ꢋ PWM ॷ
ꢟᩣꢠ᮸ꢗ
ꢐᝐ
ꢔꢕꢖ
ᣠꢑꢏ
ꢅꢆꢏ
ᣠꢎꢏ
ꢒꢓ
A
V
ᩣͅꢀիೃꢀἡዿἫፀί (Ỉ 4)
A = ꢅ V / ꢅ V ,
FB
1/2.75
1/3.00
1/3.25
V/V
V
CS
0 < V < 0.9 V
CS
Z
ᩣͅꢀᑷ (Ỉ 4)
FB > V
FB = V
3
5
7
kꢁ
mA
V
FB
G
I
ȯਾꢀἡ
−
1.2
0.9
4.2
50
2.0
1.1
4.5
60
OZ
OZ
V
OZ
ꢆՀՊᶴᩣͅꢀի
რ▏ƽᒄꢂȜꢀի
✈nრ▏ƽᒄŔ֛ᑶ៖
ͥ᮸ᨿ؏҈៖ (Ỉ 4)
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 ჵ௪ OVP ꢚỂᜇ᪠Ἣ᮸ꢗ
V
ᶴᩓ
ࡈ
֢ꢄꢀի რ▏ƚ (Ỉ 4)
ƚဆඝ (Ỉ 4)
ᩣϚ OVP (ꢃꢄ) ֛ᑶ៖
ᣠଇꢀἡ⁰
2.45
−
2.50
60
1
2.55
−
V
dB
MHz
ꢀ s
DET−OVP
Av
Bw
−
−
t
100
−
150
−
200
1
DET−OVP
I
V
= 0 V
mA
V
DET−SOURCE
DET
V
٭
ĭꢀի⛺℠ I
I
= −1 mA
= 1 mA
−
−
5
DET−HIGH
DET
DET
V
٭
ĭꢀի⛻℠ 0.5
150
3
0.7
200
4
0.9
250
5
V
DET−LOW
VALLEY−DELAY
t
®Ểᜇǁ
ח
᪠ἫАᩣϚොŔზ៖ (Ỉ 4) ᄳ PWM MOS ͓ឍ៖ DET-OVP (2.5 V)
٬Ểᜇ
ǁח
ЭẟὨꢍ៖ (Ỉ 4) ᣠଇꢀἡ⁰
ns
t
ꢀ s
OFF−BNK
t
t
8
9
10
ꢀ
s
TIME−OUT
OFF-MIN
PWM ᔏัꢝ᮸ꢗ
t
ᣠଇො៖
ᣠ෯͓ឍ៖
38
7
45
8
52
9
ꢀ s
ꢀ s
ꢀ s
V
ON−MAX−PWM
t
V
V
≥ V
OFF−MIN
FB
N
= V
32
37
42
FB
G
V
V
FB ꢀիꢀၓൂᰁჯრ؏Ŕრ
FB ꢀիꢀၓൂᰁჯ͓ꢐŔრ
FB ꢀիꢀၓ⛻ൂ͓ឍᰁჯრ₾
ࢾ
✈nё✈ PFC Ŕ FB ꢂȜꢀի
✈nё✈ PFC Ŕ FB ꢂȜꢀի
✈n؏✈ PFC Ŕ FB ₾
ࢾ
ꢀի ✈n؏✈ PFC Ŕ FB ₾
ࢾ
ꢀի ✈nё✈ PFC Ŕ PFC ͓ឍ֛ᑶ៖
1.95
1.00
−
2.10
1.15
0.1
2.25
1.30
−
N
V
G
ꢅ
V
V
G
V
1.70
1.65
1.95
1.75
400
30
1.75
1.70
2.00
1.80
500
34
1.80
1.75
2.05
1.85
600
38
V
RANGE ჵ௪ͥ᮸რᢿ
RANGE ჵ௪ͥ᮸ᖅऐ
RANGE ჵ௪ͥ᮸რᢿ
RANGE ჵ௪ͥ᮸ᖅऐ
®ොА͓ឍŔ PFC ⒖ᇡ
CTL−PFC−OFF
V
V
CTL−PFC−ON
t
ms
ꢀ s
PFC−OFF
INHIB−PFC−OFF PFC-OFF
t
t
ŔᑱЖ៖
t
PFC−OFF
t
✈n؏✈ PFC Ŕ PFC ොƽᒄზ៖ (Ỉ 4) ®͓ឍАොŔ PFC ⒖ᇡ
−
150
2.5
−
ꢀ
s
PFC−ON
t
؏҈ᙱ៖
ࡈ
(ᡕ៖ᙱ៖ࡈ
) V
V
< V
> V
2.0
25.5
3.0
39.5
ms
ꢀ s
STARTER−PWM
FB
G
32.5
FB
FB−OLP
PWM ᩣꢞ᮸ꢗ
V
PWM ᧥ᥡᩣϚ
٭
ĭꢀի PWM ᧥ᥡᩣϚꢀիĮꢀၓ
PWM ᧥ᥡᩣϚꢀի▨ꢀၓ
V
DD
V
DD
V
DD
= 25 V
16.0
−
17.5
−
19.0
1.5
−
V
V
V
CLAMP
V
OL
= 15 V, Io = 100 mA
= 15 V, Io = 100 mA
V
OH
8
−
www.onsemi.cn
8
FAN6921ML
ꢁᷴሇ (ꢈꢌ
׆
ᣩᛄ，V = 15 V，T = -40~105°C (T = T )。) (continued) DD
A
A
J
ꢋ ꢐᝐ
ꢔꢕꢖ
ᣠꢑꢏ
ꢅꢆꢏ
ᣠꢎꢏ
ꢒꢓ
PWM ᩣꢞ᮸ꢗ
t
PWM ᧥ᥡᩣϚ⛺ԧ៖
PWM ᧥ᥡᩣϚ⛻ꢎ៖
C = 3 nF,
−
−
80
40
110
70
ns
ns
R
L
V
DD
= 12 V, 20~80%
t
C = 3 nF,
L
F
V
DD
= 12 V, 20~80%
ꢁἡ᪠Ἣ᮸ꢗ
t
ᩣϚზ
−
150
0.84
0.72
0.58
0.40
0.30
200
0.87
0.75
0.61
0.46
0.35
ns
V
PD
V
LIMIT
CSPWM ჵ௪⛺Ŕ᪗ѿ╧ጵɟꢀի℠Ж
0.81
0.69
0.55
0.34
0.25
I
< 75 ꢀ A, T = 25°C
DET
DET
DET
DET
A
I
I
I
t
= 185 ꢀ A, T = 25°C
A
= 350 ꢀ A, T = 25°C
A
= 550 ꢀ A, T = 25°C
A
V
╧ጵɟ (Ỉ 4)
V
= 45 ꢀ s,
SLOPE
ON
RANGE = Open
t
= 0 ꢀ s
0.05
0.10
300
−
0.15
ON
t
ЭẟὨꢍ៖
ns
V
ON−BNK
V
CSPWM ჵ௪ਾ VCSPWM ᾃĭ▨ի
CSPWM ჵ௪ਾ
Ŕზ CSPWM Pin Floating
CSPWM Pin Floating
4.5
−
5.0
−
CS−FLOATING
t
150
ꢀ
s
CS−H
RT ჵ௪᪗ꢂꢡᒄ᮸ꢗ
ͥ᮸ OTP ŔꢂȜꢂႆ (Ỉ 4)
T
OTP
125
−
140
30
155
−
°C
°C
ꢀ A
V
T
ͥ᮸ OTP Ŕ₾
ࢾ
ꢂႆ (Ỉ 4) RT ჵ௪ͥ᮸⁰ꢀἡ
ꢃꢄᰁჯᒶֱꢀի
OTP−HYST
I
RT
90
100
0.80
110
0.85
V
0.75
RT−LATCH
V
ꢃꢄᰁჯᲚꢀի
V
V V
V
RT−RE−LATCH
RT−LATCH RT−LATCH RT−LATCH
+ 0.15
0.45
−
+ 0.20
0.50
10
+ 0.25
0.55
−
V
lॷ֛ᑶ៖ꢂȜꢀի
OTP ֛ᑶ៖
V
RT−OTP−LEVEL
t
ms
ꢀ s
RT−OTP−H
t
᮸ᒶֱ֛ᑶ៖
V
RT
< V
RT−OTP−LEVEL
70
100
130
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)
ꢈꢌ
׆
ᣩᛄ，“ꢀᷴሇ”ጸꢄϷϚŔ᠏ᐠϷἫᚥÖ⛻Ŕڡ
ሇ்֢ᝐ。ୢई⛽
Ö⛻ꢁጜ，ڡ
ሇ்
்⛾“ꢀᷴሇ”ጸ ꢄᐠϷሇ்֢ᝐ⛽⛰ೄ。
4. ᚎᙱƽᚑ。
www.onsemi.cn
9
FAN6921ML
ꢅꢆሇ்ᅡ
(᪩{ᅡ
ࣞ
ई T = 25°C Ö⛻᪫ጜᄲ⛰Ӷ。) A
18.4
18.0
17.6
17.2
16.8
16.4
10.2
10.1
10.0
9.9
9.8
9.7
95 110 125
95 110 125
95 110 125
95 110 125
−40 −25 −10
5
20
35 50
65 80
−40 −25 −10
−40 −25 −10
−40 −25 −10
−40 −25 −10
5
20 35
50 65
80
95 110 125
Temperature (°C)
Temperature (°C)
ꢃꢄ4.ꢄꢢ⃘ꢏꢁꢛ
ꢃꢄ5.ꢄPWM ꢣឍ⃘ꢏꢁꢛ
8.50
8.00
7.50
7.00
6.50
29.0
28.5
28.0
27.5
27.0
5
20
35 50
65
80
95 110 125
−40 −25 −10
5
20 35
50 65 80
Temperature (°C)
Temperature (°C)
ꢃꢄ6.ꢄꢣឍ⃘ꢏꢁꢛ
ꢃꢄ7.ꢄVDD ᪗ꢛꢡᒄ⃘ꢏ
16.0
14.0
12.0
10.0
8.0
8.0
7.0
6.0
5.0
4.0
6.0
5
20
35 50
65 80 95 110 125
−40 −25 −10
5
20 35
50
65 80
Temperature (°C)
Temperature (°C)
ꢃꢄ8.ꢄꢘꢙꢁἡ
ꢃꢄ9.ꢄꢔꢕꢁἡ
17.0
16.5
16.0
15.5
15.0
14.5
14.0
2.60
2.55
2.50
2.45
2.40
5
20
35 50
65 80
95 110 125
−40 −25 −10
5
20
35 50
65
80
Temperature (°C)
Temperature (°C)
ꢃꢄ10.ꢄPFC ᩣꢞꢟꢐꢁꢛ
ꢃꢄ11.ꢄPFC ᧥ᥡᩣꢞ
٭
ꢓꢁꢛ www.onsemi.cn
10
FAN6921ML
ꢅꢆሇ்ᅡ (ᖅ⛺ꢑ)
(᪩{ᅡ
ࣞ
ई T = 25°C Ö⛻᪫ጜᄲ⛰Ӷ。) A
28.0
27.0
26.0
25.0
24.0
23.0
22.0
0.65
0.63
0.61
0.59
0.57
0.55
95 110 125
−40 −25 −10
5
20
35 50
65 80
−40 −25 −10
5
20 35
50 65
80
95 110 125
Temperature (°C)
Temperature (°C)
ꢃꢄ12.ꢄPFC ᣠꢎꢢ៖
ꢃꢄ13.ꢄPFC ꢤꢏꢁἡ℠ꢂꢁꢛ
50.0
48.0
46.0
44.0
42.0
40.0
19.0
18.5
18.0
17.5
17.0
16.5
16.0
−40 −25 −10
5
20
35 50
65
80
95 110 125
−40 −25 −10
5
20 35
50 65 80
95 110 125
95 110 125
95 110 125
Temperature (°C)
Temperature (°C)
ꢃꢄ14.ꢄPWM ᧥ᥡᩣꢞ
٭
ꢓꢁꢛ ꢃꢄ15.ꢄPWM ᣠꢎꢢ៖
2.30
2.20
2.10
2.00
1.90
1.4
1.3
1.2
1.1
1.0
−40 −25 −10
5
20
35 50
65 80 95 110 125
−40 −25 −10
5
20 35
50
65 80
Temperature (°C)
Temperature (°C)
ꢃꢄ16.ꢄVFB ൂꢢᰁჯŔრꢥ
ꢃꢄ17.ꢄVFB ൂꢣឍᰁჯŔრꢥ
9.0
8.5
8.0
7.5
7.0
42.0
40.0
38.0
36.0
34.0
32.0
30.0
−40 −25 −10
5
20
35 50
65 80
95 110 125
−40 −25 −10
5
20
35 50
65
80
Temperature (°C)
Temperature (°C)
ꢃꢄ18.ꢄVFB > VN Ŕ PWM ᣠꢑꢣឍ៖
ꢃꢄ19.ꢄVFB = VG Ŕ PWM ᣠꢑꢣឍ៖
www.onsemi.cn
11
FAN6921ML
ꢅꢆሇ்ᅡ (ᖅ⛺ꢑ)
(᪩{ᅡ
ࣞ
ई T = 25°C Ö⛻᪫ጜᄲ⛰Ӷ。) A
1.0
0.9
0.8
0.7
0.6
0.5
2.60
2.55
2.50
2.45
2.40
95 110 125
−40 −25 −10
5
20
35 50
65 80
−40 −25 −10
5
20 35
50 65
80
95 110 125
Temperature (°C)
Temperature (°C)
ꢃꢄ20.ꢄDET ჵ௪ᩓꢦŔ
٭
ꢓꢁꢛ ꢃꢄ21.ꢄDET ჵ௪ᩣꢞ᪗ꢛꢡᒄꢐꢁꢛ
110.0
105.0
100.0
95.0
0.90
0.85
0.80
0.75
0.70
90.0
−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)
ꢃꢄ22.ꢄRT ჵ௪ꢇ᮸⁰ꢁἡ
ꢃꢄ23.ꢄRT ჵ௪᪗ꢂꢡᒄ⃘ꢏꢁꢛ
www.onsemi.cn
12
FAN6921ML
ꢈ்ᛄ
PFC ꢁᢿ
PFC VO
R 1
Error
Amplifier
VCOMP
ꢀꢁꢀꢂꢃꢄꢅꢆꢇ THD ꢈꢉꢆ
RS
Filp−Flop
PFC
MOS
2.5 V
INV
ꢄfൾ▐ᣔœᅷ҈ᇡሇ்，ᣔᇋᅷɼᇡ
ڭ
ၴ٬
ގ
̾ ᅷꢀPFC ᩣϚᾃĭ，FAN6921ML Თ✈ꢁꢅဆᣩϻថ५
ૺ
ױ
Ჟᚿ࿎ଇࡈ
Ŕᢸො५ଇࡈ
。ᚵଇࡈ
Ŕտ◦ ࣞ
ୢࣞ
ꢀ24 ᐠЊ。PFC ᩣϚꢀի᠏᪗ꢁꢅꢃꢀR1 ٬
R2ꢀꢃᏰŔ᮸ꢀℋϦիꢀᢿ®ꢀINV ჵ௪᪠ἫАŔ。
ᄳ PFC ᩣϚꢀիָӶᡕ᪗Įn֢ꢀի 2.5 V Ŕ 6%
៖，ૺ
ױ
Ჟᚿ࿎ଇࡈ
ᛓ͖ᩣϚ∬ꢀἡ⁰ꢀἡ， ®ᖰꢀ▏ᢿ
ڭ
ၴ，ِӶጵɟꢀᢿ。 3
THD
Optimizer
+
4
ꢆ
R 2
RS
+
CSPFC
Sawtooth
Generator
FAN6921
ꢃꢄ25.ꢄꢩᣩ THD ꢪꢫꢝŔꢧꢨᲟᚿꢜꢎꢝ
PFC
VO
2.65 V
IL,AVG (Fixed On−Time)
IL,AVG (with THD Optimizer)
2.35 V
R1
CO
COMP
2.5 V
INV
2
3
CCOMP
R2
Error
Amplifier
Gate Signal with
THD Optimizer
VCOMP
FAN6921
Sawtooth
Gate Signal with
Fixed On Time
OFF
ON
ꢃꢄ24.ꢄꢧꢨᲟᚿꢜꢎꢝ
ꢃꢄ26.ꢄꢩᣩꢚ⛽ꢩᣩꢄTHDꢄꢪꢫꢝ៖
ࣚ
ꢉꢢ៖Ŕꢔ ꢕỂᅂ
INVꢀჵ௪Ŕ֭ꢀիǁ
ח
⛾֢ꢀի 2.5 V ᪫ጜᶴ ᩓ，şᅷᚿ࿎ଇ
ࡈ
⁰ꢀἡ∬ꢀἡෙ͖ᩣϚꢀࡈ
Input Current
C
COMP
ꢀ᪫ጜ̥ꢀꢀ。COMP ꢀի⛾ͥ᮸⛿ᏰŔ
1.8
̿Ểᅂ᪫ጜᶴᩓ，®̾ൺꢀPFC ᧥ᥡŔො៖。
ဘ᥅ᛄ，ꢃn֭▏ᢿဆඝᩓĮ，PFC ᧥ᥡො៖
ŔָӶၴᚵ∮ဘ෯，ईꢁꢅᩣͅꢀAC
و
ͥπ.ሲ ൺ。⌖，ᩋᩍÖ⛻᪠ጜŔѿ╧
ࣀ
ᝐᨁᵃꢀᢿᣩꢁ ꢅਊ⊙，Փ᪗⇆ǯ。᪗⇆ǯşᩣͅꢀἡǯၖş
ߋ
যማꢂỂǯႆꢀ(THD) ָᅷᣔ࿎。ꢄfݤ
ᩋᩍ Ö⛻ŔማꢂỂǯႆ，ค͖᠏ईꢀᩣͅꢀի⛻，᪗
ෙꢀἡ᪠ἫꢀℋꢆƇŔꢀի᪫ጜᲗᨗᖲͅꢁꢅϻថ५
THDꢀøӶ
ࡈ
。ᚵꢀἡ᪠Ἣꢀℋ⛺ŔᲗᨗꢀի፻ΊҀА ̿Ểᅂ，✈nᛓЖ PFC ᧥ᥡො៖，
ࣀ
ᵄईԪꢅ AC
و
ͥ⛽᠏ሲൺŔො៖。THD øӶࡈ
٬
PWM +Ŕ᪠ጜយჯୢ
ࣞ
25ꢀᐠЊ。ᄳ THDꢀøӶࡈ
ईꢀAC ᩣͅꢀի∰᪡Ểᜇĭਾ᪫ጜ◦
，ጵɟො៖ָ ᅷᶴտ᥅⁏。໐Ȝꢀի℔᪡Ŕ PFC ො៖፻ꢀTHD
øӶ
ࡈ
৹ʽ。PFC MOS Ŕ៖ၯ٬ꢀዿ
ࡈ
ꢀἡŔỂᅂୢ ࣞ
ꢀ26 ᐠЊ。ࣞ
ꢀ27 ЊईԪꢅꢀAC و
ꢇ，ꢆ٧ᅷА
Ŕ
ࣚ
ൺො៖⛾Თ✈ꢀTHD øӶࡈ
៖Ŕࣚ
ൺො៖ +Ŕ࿎Ћ。
1.5
1.2
0.9
0.6
PO: 90 W
Input Voltage: 90 VAC
PFC Inductor: 460 ꢀ H
CS Resistor: 0.15 ꢁ
0.3
0
0
0.0014
0.0028
0.0042
0.0056
0.0069
0.0083
Time (Seconds)
Fixed On−time with THD Optimizer
Fixed On time
ꢃꢄ27.ꢄԪꢬ ACꢄ
و
ꢇꢩᣩꢚ⛽ꢩᣩ THDꢄꢪꢫꢝ៖ᙱ٧ᅷ
АŔ
ࣚ
ꢉꢢ៖Ểᅂ www.onsemi.cn
13
FAN6921ML
VZCD
10 V
RANGE ꢊꢋ
ͥਾĮի MOSFETꢀ
ᨙᕎ V ꢀꢀիꢀၓො͓ VIN
ឍ。ᚵͥ᮸ MOSFETꢀŔ⃯ᥡჵ௪ᖅೃ RANGEꢀჵ
௪。
ࣞ
28ꢀЊ VVINꢀꢀիꢀၓ٬
RANGEꢀℋᑷ (რᢿ ᖅऐ) Ŕ⒖ᇡᣒএ。
2.1 V
1.75 V
RANGE =
Ground
VDS
t
PFCVO
RANGE =
Open
VIN,MAX
VVIN
VVIN−RANGE−L VVIN−RANGE−H
ꢃꢄ28.ꢄRANGE ჵ௪ꢚ VIN ჵ௪ꢁꢛ+Ŕ₾
ࢾ
ጜꢭ PFC
Gate
t
ꢁꢌꢍꢎꢏ (ZCD ꢊꢋ)
ࣞ
29ꢀЊ⇆ꢀἡ᪠ἫŔͥ᮸ꢀᢿ。᪠Ἣѿ்᠏᪗ ᪠ἫPFCꢀꢀዿ
ࡈ
ᩕ҉থꢃǁ᥅ൾ▐Ŕ。֢ᒑࣞ
30， ᄳ PFC MOSꢀ͓ឍ៖，PFCꢀꢀዿꢇസʈŔ்Ჟრ
ױ
ᩣϚᩍᲚ。⅟
ꢃn PFCꢀꢀዿࡈ
⛾ඤ⛿ꢀ⛿ ꢂᔏ，PFC MOSꢀŔ⃯ᥡꢀիრℝĮ。ꢁំ ZCDꢀჵ
௪ꢀիĮnᒶֱꢀի (1.75 Vꢀ͘५Ȝ)，ฑͭᴁֱ
PFCꢀ᧥ᥡǁ
ח
，რꢁꢅថŔრ͓و
。ୢꢃnტ ဘ⒖Ε⇐ᑑꢇឍ PFCꢀ᪠ጜ，෦ ZCDꢀჵ௪ᒩĮೃꢁꢅ
Įn 0.2 V (͘५Ȝ) Ŕꢀի，®↠ἛꢀPFC ё✈ѿ்
，ȼᵂꢀPFC რ͓᪠ጜ。ꢄfℋᵂᩋᩍእΕ⛻Ϛ▐᪗ꢀ
Ŕრ͓⍡╧，Თ✈ꢁꢅͥਾŔᑱЖꢆ៖
ࡈ
᥅℠Жᣠ෯ Inhibit
Time
t
ꢃꢄ30.ꢄPFC ⇆ꢁἡ᪠ἫꢔꢕỂᅂ
PFC ॷꢁᢿꢡᒄ
PFC ꢂꢐꢌꢑ UVP ꢇ OVP (INV ꢊꢋ)
FAN6921MR ꢄ PFC ॷꢀᢿᖰŻૺҝƽᒄѿ்。PFC
ᩣϚ᪗
ի٬ᴀի
ƽᒄෙ PFCꢀॷꢀᢿ∮ဘᲝᑑ。ꢆध ꢃ INVꢀჵ௪
ꢀի᪠Ἣ٬̾ൺ
，ୢࣞ
31ꢀᐠЊ。ᄳ INV ჵ௪ꢀիꢃnϛՏტဘ⒖Εꢀn 2.75 VꢀĮn
0.45 V ၖ✄ƽᒄზ៖ᓡঽॶ 70 ꢀ s，ꢉ↠Ἓ OVP
UVP ꢀᢿ，֛Փঘᵂ PFC რ͓᪠ጜ。
t
ꢀ៖。Փş᪠ἫАꢀZCD ǁ
ח
，ईᑱЖ៖ͥ ꢂ ꢀs，͘५Ȝ) ꢈ⛽ꢉֱ PFC ᧥ᥡǁ
ח
。 OFF
(2.5
INVꢀჵ௪⛽ꢊ✈n
ᖅ٬
ᛓ PFCꢀᩣϚꢀի，✄ ᪨்ᖰŻ PFCꢀᩣϚ OVP/UVPꢀƽᒄ。ईᜥⅬᰁჯἫᚥ
ꢇ，ୢϚ▐ჵ௪ਾ，ᚵჵ௪
͓ឍ PFCꢀრ͓᪗ ӛ。
0.9 V
PFC
Gate
Driver
PFC V O
Q
R
S
ZCD
0.2 V
Debounce
Driver
Time
V Z
V AC
5
R ZCD
VREF (2.5 V)
1.75 V
R 1
L b
VCOMP
COMP
INV
C O
2
10 V
S
Voltage
1
2.1 V
PFC Gate
On
Detector
Error
Amplifier
Q
R
CCOMP
R 2
1:n
FAN6921
OVP = (V
INV ≥ 2.75 V)
UVP = (VINV ≤ 0.45 V)
ꢃꢄ29.ꢄꢇ᮸⇆ꢁἡ᪠Ἣᰁष
FAN6921
ꢃꢄ31.ꢄꢇ᮸ PFC ᪗ꢛꢚᴀꢛꢡᒄᰁष
www.onsemi.cn
14
FAN6921ML
PFC ꢒꢓꢃꢍ (CSPFC ꢊꢋ)
ई PFC ॷრ͓᪠ጜ，PFC რ͓ꢀἡꢃ CSPFC
ჵ௪⛺Ŕꢀἡ᪠Ἣꢀℋ᪠Ἣ，ၖ✄ᚵꢀℋ⛺Ŕ᪠Ἣꢀ
ի፻ꢋᩣೃᶴᩓ
ࡈ
Ŕᩣֿͅര，⛾⃐Ȝꢀի 0.6 V (͘ ५Ȝ)ꢀ᪫ጜᶴᩓ。ꢁំ CSPFCꢀჵ௪ꢀիꢀn⃘Ȝꢀ
ի，PFC ᧥ᥡ֛Փ͓ឍ。
AC Input
VCOMP−BO
VCOMP
1.6 V
VVIN−UVP
VVIN−RE−UVP
PFCꢀ໐Ȝრ͓ꢀἡ
ꢃꢀἡ᪠Ἣꢀℋᛓ。ࣞ
32ꢀ Њ PFC
᧥ᥡ٬
CSPFC ჵ௪ꢀիŔἫᅷỂᅂ。 VVIN
PFC MOS Current Limit
0 V
2.5 V
VINV
V
INV−BO
CSPFC
1.2 V
OPFC
OPWM
OPFC
Brownout
Protection
Debounce
Brownout
Protection
Hiccup
ꢃꢄ32.ꢄ
و
℠ἡ ꢄꢌ/ꢔꢌꢕꢖ (VIN ꢊꢋ)
Time 100 ms
Mode
᪗ ACꢀꢀի᪠Ἣ，FAN6921MRꢀ
Åൾ▐ꢀ/ᕩ ꢀƽᒄ (ACꢀꢀի UVP)。
ࣞ
33ꢀЊ͓῾࿅ꢌỂᅂ。Თ ✈ VINꢀჵ௪᥅᪠Ἣ ACꢀᩣͅꢀիꢀၓ，ၖ✄ VINꢀჵ௪
᪗ꢀℋϦի
ࡈ
ᖅೃ ACꢀᩣͅ (֢ᒑࣞ
1)；ࣀ
ᵄ， ꢃꢄ33.ꢄꢁ/ᕩꢁꢡᒄꢔꢕỂᅂ
VDD
VDD Hiccup Mode
V
VIN
ꢀꢀի⛾ ACꢀᩣͅꢀիᏰᵃᶴ。ᄳ ACꢀꢀի⛻ℝ，
ၖ✄ V ꢀꢀիĮn 1 VꢀŔ៖ᓡঽ 100 ms，ꢉ↠Ἓ
VIN
Brownout
Brown−In
UVPꢀƽᒄၖ✄ COMPꢀჵ௪ꢀի፻
٭
ĭnଇॶ 1.6 V。 ꢃn PFCꢀ᧥ᥡՀՊᶴ᪗ᶴᩓ̿
Ểᅂ٬
COMPꢀჵ ௪ꢀի̾ൺ，ᩓĮŔ COMP ꢀիꢉොꢇᩓʽŔ PFC
ො៖，
ࣀ
ᵄꢈꢁŔ்Ჟᣩ℠ၖ✄ PFCꢀᩣϚꢀիℝ Į。ᄳ INVꢀჵ௪ꢀիĮn 1.2 V，FAN6921MRꢀ֛Փঘ
AC Input
OPWM
OPFC
ᵂꢁϧ PFCꢀ
٬
PWMꢀრ͓᪠ጜ，DŽೃ V ꢀꢀիꢉೃ ͓ឍꢀի⌖
ͭᴁԧೃොꢀի (UVLO)。 DD
↠Ἓᕩꢀƽᒄ
，ᐠᣩრ͓᪠ጜꢊ፻͓ឍ，V ꢀꢀ DD
ꢀꢀի
ի᪫ͅᐳ
ᰁჯ，ᓡঽ⛺⛻Ể҈。ꢁDŽА V VIN
ꢀn 1.2 V (͘५Ȝ)ꢀၖ✄ V ꢀͭᴁꢋАොꢀի，ᐭ
ꢉֱ PWM
٬
PFC ᧥ᥡǁח
。 DD
ꢃꢄ34.ꢄꢁ/ᕩꢁꢡᒄἫᅷỂᅂ (ᰝꢝၴ✈)
ꢀ/ᕩꢀƽᒄἫᅷỂᅂୢ
ࣞ
34 ᐠЊ。 www.onsemi.cn
15
FAN6921ML
PWM ॷ
ൺ)ꢀ
，ͥ᮸Ểᜇ᪠Ἣꢀᢿ፻↠Ἓ，✈n᪠Ἣ PWMꢀრ ͓⃯ᥡꢀիỂᜇ。ᄳ᪠ἫАỂᜇǁ
ח
，FAN6921MR ᩣϚ PWMꢀ᧥ᥡǁ
ח
，®ොრ͓ၖრꢁꢅថŔ რ͓
و
。 HV ꢗꢘꢇꢙꢚꢌꢍ (HV ꢊꢋ)
HVꢀჵ௪᪗ꢁꢅꢀℋᖅೃ ACꢀএᢿ (֢ᒑ
ࣞ
1)。 ᪗ꢁꢅͥਾŔꢀի؏҈ꢀᢿ，ᄳឝҀ ACꢀꢀիАꢀ
⁰
ߋ
য៖，FAN6921MRꢀᖰŻꢁꢅꢀꢀἡױ
᮸ V ꢀ
ࡈ
̥ꢀ，®৹ʽᖇЖࡈ
Ŕ؏҈៖ၖईꢍҢͥ ᪗ᩋᩍÖ⛻Ŕൂᰁჯ᪠ጜ
٬Ể
ᜇ᪠Ἣ，ꢀ⁰ ߋ
য்૿ზ⁏ DCMꢀ᪠ጜᰁჯ⛻ŔỂᜇრ͓，ၖ்૿ ᪫ꢁᵅίრ͓ᔿꢍ，®ൾ▐ᣔœᅷꢐᕂᜨ╧。FB
DD
ᖰꢀА᧧ΦꢌൺᩣϚꢀի。ꢄfίѿꢍ，ई V ꢀꢀ
DD
իᡕ᪗ොꢀիၖ᪫ͅᵃဘ᪠ጜ
，ᚵꢀի؏҈ꢀᢿ ჵ௪ꢀի⛾ t
ꢀ៖ᅡᣒএୢ
ࣞ
37ꢀᐠЊ。ୢ OFF-MIN
ࣞ
37ꢀᐠЊ，FAN6921MRꢀ
Åზ⁏ t ꢀೃ2.5 ms，ᵄ OFF
ꢉ፻͓ឍ，®ꢎꢎ؏҈ꢀℋ⛿ѿꢍ。
ࣞ
35 Њ V ꢀի٬࿅
ꢌꢀἡ I Ŕᅡᣒএ。ᄳ ៖ଇॶꢄ 400 Hz Ŕრ͓⍡╧。
DD
DD
֢ᒑ
ࣞ
1ꢀ٬
ࣞ
2，FBꢀჵ௪ꢀի⛽ꢊ✈nᖅᴁॷ֭ ǁ
ח
Å̾ൺ᧥ᥡො៖，᪨✈n̾ൺ PFCꢀॷꢀᢿ Ŕො͓ឍ⒖ᇡ。ईՊᩍᩋᩍÖ⛻，ୢ PFC
ॷꢀᢿꢅਾꢄ͓ឍ，
Åί PFCꢀॷრ͓ࡈ
ÖŔѿꢍ ၖᖰꢀꢐᕂᜨ╧。ᄳᩣϚᩍί
，FBꢀჵ௪ꢀիℝ Į，
ࣀ
ᵄ， FAN6921MRꢀ
Åᨙᕎ FBꢀჵ௪ꢀի᪠Ἣ ᩣϚᩍȜ，®ᖇЖ PFC ᮸ϦŔො/͓ឍ⒖ᇡ。
V
ꢀꢀիĮn V
，FAN6921MRꢀঘᵂꢁϧ
DD-PWM-OFF
რ͓᪠ጜၖ͓ឍᦰꢏͥ᮸⛽ᆥᑑŔꢀᢿ，®ℝĮ࿅
DD
ꢌꢀἡ。ꢏᨗꢐ，® V ꢀА V ꢀŔ៖
DD-OFF
ꢉზ⁏，ᐳ
ᰁჯ⍡╧ꢉℝĮ，®ℝĮᩣϚʽᢿ DD-PWM-OFF
⒖Ε⛻Ŕᩣͅѿ╧。
ࣞ
36ꢀЊᐳ
ᰁჯ᪠ጜꢇ V ꢀի٬᧥ᥡ
ǁח
Ŕ͘५Ểᅂ。 DD
IDD
tOFF−MIN
2.5 ms
IDD−OP
PFC On
IDD−PWM−OFF
IDD−ST
PFC OFF
37 ꢀ s
VCTRL−PFC
ꢅ
V
C
T
R
L
VDD
8 ꢀ s
VDD−OFF VDD−PWM−OFF VDD−ON
VFB
ꢃꢄ35.ꢄVDD ⛾ IDD OP ᅡᣒএ
-
2.1 V (VN)
1.15 V (VG)
VDD−ON
ꢃꢄ37.ꢄVFB ꢁꢛ⛾ tOFF MIN ៖ᅡᣒএ
-
IDD−OP
ꢥꢦꢎꢏ (DET ꢊꢋ)
ᄳ FAN6921MRꢀÅൂᰁჯ᪠ጜ៖，t
ꢃൂᰁჯꢀᢿᨙᕎ FBꢀჵ௪ꢀիꢀၓ̾ൺ。t
VDD−PWM−OFF
ꢀ៖
OFF-MIN
VDD−OFF
OFF-MIN
៖
，ͥ᮸Ểᜇ᪠Ἣꢀᢿ፻↠Ἓ。ई PWMꢀრ͓͓ ឍ៖ͥ，ᄳָի
ࡈ
ꢀዿꢀἡꢀೃ⇆៖，PWMꢀრ ͓Ŕָի
ࡈ
ꢀዿ٬ඤ⛿ꢀრ
៖ꢂᔏ。ᄳ PWM IDD−PWM−OFF
IDD−ST
Gate
რ͓Ŕ⃯ᥡꢀիℝĮ៖，ᩕ҉থꢃꢀի V
ꢀꢈ⅟+
⛻ℝ，ꢏ᠏
ࣀ
ꢄᩕ҉থꢃ⛾ϽॷথꢃᏰꢑר
⒖ᇡ。 AUX
ꢃꢄ36.ꢄᐳ
ᰁჯꢃጜꢮ VDD ꢁꢛꢚ᧥ᥡǁꢋŔꢅꢆỂᅂ ꢁំ V ꢀꢀիꢂᔏၖℝೃꢀի，V ꢀꢀիฑꢃ
AUX
DET
ꢛꢜꢝꢞꢅꢟꢇ PFC ꢠꢄ/ꢡꢢꢣꢤ (FB ꢊꢋ)
DET ჵ௪᪫ጜ
٭
ĭ (֢ᒑࣞ
38) ၖ✄ᄚЖ FAN6921MR ᩣϚꢀἡ I 。FAN6921MLꢀ֭᠀ၖᶴᩓᚵ I ꢀꢀ
Თ✈ൂᰁჯ᥅᪫ꢁᵅί
ߋ
যꢇŔѿꢍ (ୢრ͓ ᔿꢍ)。ൣᲗ✈ҋএᛓЖᑠᤏ，ᨙᕎ FBꢀჵ௪ꢀիᛓ
რ͓⍡╧。ᄳᩣϚᩍί෯៖，ꢃnᴁॷ֭᪠҈ FB
DET
DET
ἡ。ୢᚵ⁰ꢀἡ⛺ԧೃ⃐Ȝꢀἡ，ई
ࣚ
ൺზ៖ (200 ns，͘५Ȝ)
ֱ PWM ᧥ᥡǁח
。 ꢀիℝĮ，t
ꢀზ⁏。ᄳ t
(ꢃ FBꢀꢀի̾
OFF-MIN
OFF-MIN
www.onsemi.cn
16
FAN6921ML
R
ꢀꢀℋ®ᩕ҉থꢃᖅೃ DETꢀჵ௪。࿅ӛꢒ
ظ
DET
Auxiliary
Winding
Åᛓᚵ R ר
Ŕ V ꢀꢀℋ，Åꢖᅷꢗꢀ⁰
ߋ
য⇐ᑑŔ ꢀꢀἡ⛾
DET
DET
ꢀꢀի。CSPWMꢀჵ௪ I
LIMIT
+
VAUX
−
V
ꢀիŔᅡᣒএୢ
ࣞ
41 ᐠЊ。 LIMIT
RDET
DET
ƪ
ǒ
Ǔƫ
10
IDET + VIN NA ń NP ń RDET
0.3 V
+
(eq. 1)
RA
IDET
VDET
͖ꢇ，V ꢀ᠏ᩣͅꢀի；N ꢀ᠏ᩕ҉থꢃӽᝐ；N ꢀ᠏
IN
Ͻॷথꢃӽᝐ。
A
P
FAN6921
−
ꢃꢄ38.ꢄỂᜇ᪠Ἣ
V
AUX
Start to
detect valley
Idet flow out
from DET pin
0 V
V
AUX
0 V
V
DET
VAUX = −[VIN x (Na / Np)]
Delay, then
trigger gate signal
DET pin voltage is clamped
during tON period.
VDET
Valley
switching
0 V
tON
0 V
tOFF
OPWM
OPWM
tOFF
ꢃꢄ40.ꢄVAUX ⛾ VIN +Ŕꢣ
ߋ
ꢃꢄ39.ꢄỂᜇ᪠ἫἫᅷỂᅂ
900
800
700
600
500
400
300
ꢆ/ꢧꢑꢨꢇꢈꢩꢪꢫꢬ (DET ꢊꢋ)
ဘ᥅ᛄ，ᄳѿ╧რ͓͓ឍ៖，®᧥ᥡǁ
ח
⛻ℝꢒ ꢓАѿ╧რ͓͓ឍസईꢁꢅზ៖。ᚵზ᠏
ࣀ
ꢄ PWMꢀრ͓᧥ᥡꢀℋ
٬᧥⁰ᥡꢀ
C ꢀꢃᖇЖࡈ
Ŕ ISS
ͥ᮸ꢋᩣზ
٬
PWMꢀრ͓Ŕ͓ឍზ៖⛿Ŕ。 ई⛽
Ŕ ACꢀᩣͅꢀի⛻，ई PWMꢀꢀἡ℠ȜLj
៖，ᚵზ៖⛿⛽
ŔᣠଇᩣϚѿ╧。ᩣͅꢀի ꢔꢀ，⛿ŔᣠଇᩣϚѿ╧ꢔꢀ，ꢏ᠏
ࣀ
ꢄឝҀАϽ ॷথꢃ⛺Ŕꢀիᩓꢀ，ၖ✄ොꢇᩓꢀŔ⛺ԧ╧ꢀዿ
ꢀἡ。ईLj
Ŕზ⛻，ꢉ⛿ᩓꢀŔ໐Ȝꢀዿꢀ ἡ。
׆
，ईᩣϚѿ╧Lj
៖，ꢀএᢿꢀի៖Ŕ໐Ȝ რ͓ꢀἡĮnĮএᢿꢀի៖。
ࣀ
ᵄ，ꢄfşᣠଇᩣϚ ѿ╧ई⛽
ᩣͅꢀի⛻ᶴᩓᖅ᪡，ᖇЖࡈ
⇐ᑑᛓ 0
100
200
300
(ꢀ A)
400
500
600
IDET
CSPWM ჵ௪Ŕ V ，✈nᖇЖ PWM რ͓ꢀἡ。
LIMIT
֢ᒑ
ࣞ
40，ई PWMꢀრ͓ොꢀ៖ͥ，ᩣͅꢀի፻ ឝҀАϽॷথꢃၖ✄ᩕ҉থꢃꢀի V ꢀ⛾Ͻॷথꢃ
ꢀիᏰᵃᶴ。
ࣀ
ᵄ⅟Ȑᩣͅꢀիԧꢀ，ᩕ҉থꢃ֭ ꢃꢄ41.ꢄIDET ꢁἡ⛾ VLIMIT ꢁꢛᅡᣒএ
AUX
ꢭꢮꢯꢉ (LEB)
ᄳ PFCꢀ PWMꢀრ͓ො៖，ꢃnᩣϚꢓᥡ
ٱ
֭ױ
ቂ૭்Ჟ
٬ѿ╧
MOSFET C ꢀ⛿Ŕꢔꢕᅑڭ
ꢉई ꢀի V ꢀꢈ⅟Ȑԧꢀ。FAN6921MLꢀ᪨ෙ DETꢀჵ௪
AUX
OSS
ꢀի᪫ጜ
٭
ĭ，ၖᩣϚꢀἡ I 。ꢃnꢀἡ I
ꢀ⅟
DET
DET
ꢀἡ᪠Ἣꢀℋ⛺ዿၴꢁꢅꢀի໐。ꢄfℋᵂᚵ໐
Ŕᅑ
ڭ
，FAN6921MRꢀꢇͥਾꢁꢅЭẟὨꢘ៖，ၖ ᖈꢙई CSPWMꢀჵ௪
٬
GNDꢀ+ᖅꢁꢅ෯५ RC Ể
ࡈ
(ୢ 100 ꢁ，470 pF)。 V
ꢀꢀիָӶ，
ࣀ
ᵄ FAN6921MRꢀ
ई PWMꢀො៖ AUX
ͥꢑꢕᚵꢀἡ IDET，®ᛓ PWMꢀრ͓Ŕꢀἡ℠
Ȝ，ൾ▐ꢀ/Įիএᢿ᪗ѿ╧ጵɟ。
⅟Ȑᩣͅꢀիԧꢀ，ᩕ҉থꢃ֭ꢀի V
(ꢈ⅟
AUX
Ȑꢀἡ I
ᩓĮŔꢀၓ。
)ꢀԧꢀ，ၖ✄ᖇЖ
ࡈ
෦ V ꢀᛓАꢁꢅ
LIMIT
DET
www.onsemi.cn
17
FAN6921ML
PWM
Gate
PWM ॷꢁᢿꢡᒄ
VDD ꢊꢋꢈꢑꢕꢖ (OVP)
V
DD
ꢀ᪗իƽᒄѿ்✈nꢚᵂ V ꢀꢀիꢀn
ࡈ
Öၴѻ DD
ꢌൺꢀի៖
ࡈ
Ö፻ᔿय。ई V OVPꢀእΕ⛻，ᖇЖ DD
ࡈ
֛Փঘᵂꢁϧრ͓᪠ጜ，ၖ᪫ͅ₹ῑ͓ឍᰁჯ，DŽ ೃឍრ AC ᖲଔ。
t
ꢰꢱꢲꢳꢈꢴꢕꢖꢇꢵꢊꢋꢌꢶꢷ (RT ꢊꢋ)
ࣞ
42ꢀ᠏ဆᣩ RTꢀჵ௪ͥ᮸ᰁषŔ͘५ၴ✈ꢀᢿ。ୢ NA
NS
VAUX
VO x
ࣞ
ᐠЊ，RTꢀჵ௪ᩣϚሲἡ I ，ࣀ
ᵄ
Åꢖᅷ RTꢀჵ RT
௪⛺Ŕꢀի V ，Փ I ꢀꢀἡꢖÅꢀℋ (ꢃ NTCꢀꢀℋ
RT
RT
٬
R ꢀꢀℋꢃᏰ)。ୢ RTꢀჵ௪ꢀիĮn 0.8 Vꢀၖ✄ A
ᓡঽ៖ꢄƽᒄზ៖，ꢉ↠Ἓ₹ῑᰁჯၖঘᵂꢁ
t
ϧ PFC
٬
PWM რ͓᪠ጜ。 RTꢀჵ௪ဘ✈n᪗ NTCꢀꢀℋൾ▐᪗ꢁƽᒄ，ၖ
ෙ͖ൣƽᒄѿ்ᖰŻ᮸₹ῑᒶֱ。࿅ӛꢒ
ظ
ÅᲗ ✈ꢁꢅ᮸ᒶֱꢀᢿ (ୢᡖꢗ
ٱ
)ꢀ᥅ᒩĮ RTꢀჵ௪ၖ↠ ἛᖇЖ
ࡈ
₹ῑᰁჯ。 NA
NP
RA
PFC_ VO
x
NA
VO x
VDET
x
Sampling
Here
NS RDET + RA
ဘ᥅ᛄ，᮸₹ῑᒶֱ⇐ᑑᇋꢛ↠Ἓ，
ࣀ
ꢄൣ ဘ✈nტဘ⒖Ε⛻ƽᒄꢀ⁰
ߋ
য。ࣀ
ᵄ，ꢁំ RTꢀჵ ௪ꢀիĮn 0.5 V，RTꢀჵ௪Ŕƽᒄზ៖ꢅਾꢄଇ
ॶ 100 ꢀ s。
t OFF
Blanking
ෙn᪗ꢁƽᒄ，ꢃnꢁႆ⛽்֛Փָ，
ࣀ
ᵄ RT ჵ௪ꢀիꢈ᠏ꢜፂℝĮ。
ᛓ OTPꢀŔꢄᑶ៖⛽⇐ ᑑᇋꢛ
ڭ
ၴ。ꢄfꢚᵂ RTꢀჵ௪ꢃnގ
̾ἫᚥÖ (ୢ ⍇Ἣᚥ)ꢀϚ▐⛽ቐᄳŔ₹ῑᒶֱ，ᄳ RTꢀჵ௪ᒶֱꢀ
իꢀn 0.5 Vꢀ៖，ƽᒄზ៖፻ꢅਾꢄଇॶ 10 ms。
ꢄfꢎꢎ RTꢀჵ௪⛽ቐᄳŔᒶֱ，ლꢝΊҀꢁꢅ෯५
0.3 V
t
ꢃꢄ43.ꢄᩣꢞ᪗ꢛ᪠ἫꢔꢕỂᅂ
ꢀ
ࡈ
(ୢ 1000 pF)，⛾ NTC ٬
R ꢀℋၖꢞ。 A
ꢸꢹ、ꢺꢇꢇꢈꢍꢕꢖ (FB ꢊꢋ)
֢ᒑ
ࣞ
44，ई FAN6921MLꢀ᮸，FBꢀჵ௪ᖅೃ ꢙꢀꢑ
ࡈר
ᡖꢗٱ
Ŕꢁꢀᥡ。ई FAN6921MLꢀͥ᮸， FB ჵ௪᪗ꢁꢅ ~5 kꢁ Ŕꢀℋᖅೃͥ᮸ꢀիꢚਾ。
⅟ȐᩣϚᩍଇ，ᩣϚꢀիℝĮ，ၖ✄ϽॷƇꢙ
ꢀꢑ
ࡈר
ᡖꢗٱ
Ŕ∬ꢀἡί෯。ࣀ
ᵄ，FBꢀჵ௪ꢀիࣀ
ͥ᮸ꢀիꢚਾԧꢀ。ईრ▏、ᩣϚʽᢿ᪗ᩍÖ
⛻，ᚵ∬ꢀἡ᪫ꢁᵅί෯ၖ✄ FBꢀჵ௪ꢀիꢃͥ᮸ꢚ
ਾꢀիᒩೃꢀꢀၓ。ᄳ FBꢀჵ௪ꢀիꢀn 4.2 VꢀŔ៖
ꢋА 50 ms，ꢉ↠Ἓ FB ჵ௪ƽᒄ。
FAN6921
Adjustable Over−Temperature Protection
and External Latch Triggering
= 100 ꢀ A
IRT
12
RT
Debounce
Time
Latched
0.8 V
0.5 V
NTC
RRT
100 ꢀ s
10 ms
ꢃꢄ42.ꢄ
ᛓ᪗ꢂꢡᒄ VO
ꢂꢐꢈꢑꢕꢖ (DET ꢊꢋ)
֢ᒑ
ࣞ
43，ई PWMꢀָիࡈ
ꢀዿࡈ
ꢀ，ᩕ҉ থꢃꢀի®ᴁॷথꢃ֭ᅷА，
ࣀ
ᵄ DETꢀჵ௪Ŕԃൺ FB
ꢀի⛾ᩣϚꢀիᏰᵃᶴ。FAN6921MLꢀ
Åई t Ὠꢘ៖
ෙᚵԃൺꢀիꢀၓ᪫ጜᲗᨗ，®ൾ▐ᩣ OFF
Ϛ᪗իƽᒄ。ᚵ t ꢀὨꢘ៖✈nᇝ5 PWMꢀָի
ࡈ
OFF
⃯ꢀዿꢇŔꢀիᔏꢟ。ᚵᲗᨗԃൺꢀիꢀၓ⛾ͥ᮸⃐
Ȝ ꢀ ի 2.5 V ꢀ ᪫ ጜ ᶴ ᩓ ， ꢁ ំ ↠ Ἓ ƽ ᒄ ѿ ் ，
FAN6921ML ฑ᪫ͅ₹ῑᰁჯ。
ईᩣϚ᪗իእΕ，᪗ꢏҝꢠ
و
Თᨗយჯ，ᖇЖ ࡈ
Åൾ▐ᇋꢛƽᒄ。ƽᒄꢀիꢀၓ
ꢃ᮸ꢀℋϦ Open−Loop
Short Circuit / Overload
ի
ࡈ
R ꢀ٬
R ꢀŔᶴꢘ̾ൺ。DETꢀჵ௪Ŕԃൺꢀի
DET
A
ÅꢡꢋꢄÅ⛻យӛჯ： ꢃꢄ44.ꢄFB ჵ௪რ▏、ʽᢿ、᪗ᩍꢡᒄ
RA
ǒ
Ǔ
VDET + NA ń NS VO
(eq. 2)
RDET ) RA
www.onsemi.cn
18
FAN6921ML
VCC ꢻꢑꢌꢼ (UVLO，VDD ꢊꢋ)
֢ᒑ
ࣞ
35ꢀ٬
ࣞ
36，ො٬
͓ឍ V ꢀ⃐ȜꢀիϦЋ V
ꢀꢀ
ࡈ
ꢋᩣ்Ჟ+Э，ᚵƽᓡꢀࡈ
ᆥꢢꢣᓡ᪠ DD
ጜᐠ⇐Ŕ V ꢀꢀի்Ჟ。ᄳ V ꢀꢀիꢋАොꢀ
DD
DD
DD
ࣚ
ൺई 18 Vꢀ٬
10 V。ई؏҈，ƽᓡꢀࡈ
(V ի，ୢई V ꢀիℝೃ͓ឍꢀի V
ꢀ+
DD-PWM-OFF
DD
DD
ꢀ
ࡈ
)ꢀꢃ HVꢀ؏҈ꢀἡ̥ꢀ，DŽೃ V ꢀꢀիꢋАො DD
ꢀի。ईᩣϚꢀի⛺ԧАꢌൺꢀիၖ®ᩕ҉থꢃ
ױ
Эᤊᒶֱƽᒄѿ்，FAN6921MLꢀฑꢉრᐠᣩრ͓
᪠ጜ。
ᙲǁ
†
ꢝꢖ০ꢋ
᪗ᩍꢡᒄ (OLP) ᰁჯ
ꢄസ
ࡈ
ꢔꢕꢂႆීꢯ
ꢰ᎕
Shipping
FAN6921MLMY
−40°C ೃ +105°C
16ꢀჵ௪෯บෘ᎕ (SOP)
2500 / 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.
www.onsemi.cn
19
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
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically
disclaims any and all liability, including without limitation special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the
rights of others.
© Semiconductor Components Industries, LLC, 2019
www.onsemi.com
onsemi,
, and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates
and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.
A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. onsemi reserves the right to make changes at any time to any
products or information herein, without notice. The information herein is provided “as−is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the
information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use
of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products
and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information
provided by onsemi. “Typical” parameters which may be provided in onsemi data sheets and/or specifications can and do vary in different applications and actual performance may
vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license
under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems
or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should
Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
ADDITIONAL INFORMATION
TECHNICAL PUBLICATIONS:
Technical Library: www.onsemi.com/design/resources/technical−documentation
onsemi Website: www.onsemi.com
ONLINE SUPPORT: www.onsemi.com/support
For additional information, please contact your local Sales Representative at
www.onsemi.com/support/sales
相关型号：
FAN6921MRMY
Switching Controller, Current-mode, 60kHz Switching Freq-Max, PDSO16, GREEN, MS-012AC, SOIC-16
FAIRCHILD
©2020 ICPDF网 联系我们和版权申明