FLS3217M [ONSEMI]
单级 PFC 初级侧调节离线 LED 驱动器,带集成功率 MOSFET;型号: | FLS3217M |
厂家: | ONSEMI |
描述: | 单级 PFC 初级侧调节离线 LED 驱动器,带集成功率 MOSFET 驱动 功率因数校正 驱动器 |
文件: | 总15页 (文件大小:635K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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July 2014
FLS3217 / FLS3247
具有集成功率MOSFET的单级功率因数校正的原边反馈离线
式 LED 驱动控制器
说明
特性
FLS3217 / FLS3247 为高度集成的脉宽调制控制器及功率
. 无输入大电容和反馈电路的高性价比解决方案
MOSFET,具有多种功能,可以提高低功率反激式转换器的
. 功率因数校正(PFC)
性能。该专有拓扑使 LED 照明应用的电路设计得以简
化。
. 集成功率MOSFET
通过使单级PFC的原边反馈拓扑,LED 照明电路板能采用
. 不依赖在线电压、输出电压及电感变化的精确恒定电
流(CC)控制
更少的外部元件实现,从而将成本降至最低,无需大容量
输入电容或反馈电路。为了实现较好的功率因数和较低的
总谐波失真度,采用一个连接至 COMI 引脚的外部电容进
行恒定导通时间控制。
. 提高效率的线性频率控制
. 开路/短路LED保护
. 逐周期限流
与输入输出电压的变化相比,精确的恒定电流控制可精确
控制输出电流。工作频率与输出电压成比例调节,以保证
DCM能够更加高效低运行,其设计也更为简单。
. 过温保护(带自动重启)
. 低启动电流: 20μA
. 低工作电流: 5 mA
. VDD过压保护 (OVP)
. VDD欠压锁定 (UVLO)
. 应用电压范围: 80VAC ~ 308 VAC
FLS3217 和 FLS3247 具有保护功能,例如 LED 开路保
护、LED 短路保护和过温保护。电流限制电平自动降低以
将输出电流降至最低,在短路LED情况下保护外部器件。
应用
. LED 照明系统
订购信息
工作
器件编号
封装
包装方法
卷带和卷盘
塑料管
温度范围
FLS3217M
7 引脚小外形封装 (小外形集成电路,SOIC)
7 引脚小外形封装 (双列直插式封装,DIP)
FLS3217N
FLS3247N
-40°C至 +125°C
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
.
应用框图
BRIDGE DIODE
TRANS
LINE INPUT
FUSE
2 VDD DRAIN
NC
7
6
4
1
COMI
GND
5
VS
CS
3
图1.
典型应用
内部框图
图2.
功能框图
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
2
标识信息
ZXYTT
S3217
TM
F: 飞兆公司标志
Z: 工厂编码
X: 一位数字年份代码
Y: 一位数字周代码
TT: 两位数字模具运行代码
T: 封装类型 (M=SOIC, N=DIP)
M: 制造 流程编码
ZXYTT
S3247
TM
图3.
顶标
引脚布局
图4.
引脚布局
引脚定义
引脚号
1
名称
CS
说明
电流检测。此引脚连接电流检测电阻,用来检测 MOSFET 电流,进行恒流调节中的输出电流调
节。
2
3
VDD
GND
电源。集成电路工作电流和 MOSFET 驱动电流通过此引脚提供。
接地
电压检测。此引脚检测输出电压信息,以及最大频率控制和恒流调节的放电时间。此引脚通过分
压器电阻与变压器辅助绕组相连。
4
VS
5
6
COMI
NC
恒流环路补偿。此引脚与 COMI 和 GND 之间的电容器相连,实现补偿电流回路增益。
未连接
7
DRAIN 功率 MOSFET 漏极。此引脚是高压功率 MOSFET 漏极。
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
3
绝对最大额定值
应力超过绝对最大额定值,可能会损坏器件。在超出推荐的工作条件的情况下,该器件可能无法正常工作,所以不建议
让器件在这些条件下长期工作。此外,过度暴露在高于推荐的工作条件下,会影响器件的可靠性。绝对最大额定值仅是
应力规格值。
符号
VVDD
参数
最小值
最大值
30
单位
直流电源电压(1,2)
VS 引脚输入电压
CS 引脚输入电压
COMI 引脚输入电压
V
V
V
V
VVS
-0.3
-0.3
-0.3
7.0
VCS
7.0
VCOMI
7.0
TA=25°C,
FLS3217M/N
1
ID
连续漏极电流
A
TA=25°C, FLS3247N
FLS3217M/N
4
4
IDM
IAR
PD
脉冲漏极电流
雪崩电流
A
A
FLS3247N
16
1
FLS3217M/N
-
FLS3247N
4
SOIC, TA<50°C
DIP, TA<50°C
SOIC, TA<50°C
DIP, TA<50°C
SOIC, TA<50°C
DIP, TA<50°C
660
1
mW
W
功耗
150
95
40
25
+150
+150
+260
5
ΘJA
ΘJC
热阻(结到空气)
热阻(结到外壳)
°C/W
°C/W
TJ
TSTG
TL
最大结温
°C
°C
°C
存储温度范围
-55
焊接温度(焊接 10 秒)
静电放电能力, 人体放电模型
静电放电能力, 组件充电模式
ESD
V
2
注意:
1. 若压力超过绝对最大额定值中所列的数值,可能会给器件造成不可修复的损坏。
2. 测得的所有电压,除差模电压之外,都参照GND引脚。
推荐工作条件
推荐的工作条件表明确了器件的真实工作条件。指定推荐的工作条件,以确保器件的最佳性能达到数据表中的规格。飞
兆半导体建议不要超过推荐工作条件,也不能按照绝对最大额定值进行设计。
符号
TA
参数
最小值
-40
最大值
125
单位
°C
操作环境温度
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
4
电气特性
除另有规定外,VDD=15 V 且 TA=25°C。
符号
MOSFET 部分
BVDSS
参数
漏极-源极击穿电压
静态漏源通态电阻
条件
最小值 典型值 最大值 单位
ID=250 µA, VGS=0 V
ID=0.5 A, VGS=10 V
ID=1 A, VGS=10 V
700
V
Ω
FLS3217M
FLS3217N
FLS3247N
FLS3217M
FLS3217N
FLS3247N
FLS3217M
FLS3217N
FLS3247N
13
8.8
2.4
175
250
435
23
16
11.0
2.8
200
Ω
RDS(ON)
Ω
pF
pF
pF
pF
pF
pF
VGS=0 V, VDS=25 V, fS=1
MHz
CISS
输入电容
输出电容
25
COSS
VGS=0V, VDS=25V, fS=1MHz
25
51
VDD部分
VDD-ON
启动阈值电压
断开阈值电压
工作电流
14.5
6.75
2.85
16.0
7.75
4.00
2
17.5
8.75
5.00
20
V
V
VDD-OFF
IDD-OP
mA
μA
V
VS=2.4 V, CL=MOSFET CISS
VDD=VDD-ON – 0.16 V
IDD-ST
启动电流
VOVP
VDD 过压保护水平
22.0
23.5
25.0
振荡器部分
fMAX-CC
恒流最大频率
恒流最小频率
VDD=10 V, 20 V
60
65
70
kHz
kHz
V
fMIN-CC
VDD=10 V, 20 V
21.0
2.25
0.55
12
23.5
2.35
0.85
14
26.0
2.45
1.15
16
VSMAX-CC
VSMIN-CC
tON(MAX)
恒流最大频率时VS电压
恒流最小频率时Vs电压
最大开启时间
频率=最大频率-2 kHz
频率=最大频率+1 kHz
V
μs
电流检测部分
VRV
参考电压
2.475
2.38
2.500
2.43
2.525
2.48
V
V
CS 引脚电压变化测试,用以恒流
调节
VCCR
VCS=0.24 V
tLEB
tMIN
前沿消隐时间
300
600
100
40
ns
ns
ns
%
恒流模式下的最小导通时间
GATE 输出传播延迟
SAW 限制器占空比
VVS=-0.5 V, VCS=1.5 V
tPD
50
150
DSAW
tDIS-BNK
IVS-BNK
tDISVS电压消隐时间
1.5
100
μs
μA
VS电压检测消隐时VS脚电流
接下页
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
5
电气特性 (续)
除另有规定外,VDD=15V 且 TA=25°C。
符号
参数
条件
最小值 典型值 最大值 单位
电流误差放大器部分
Gm
ICOMI-SINK
ICOMI-SOURCE
VCOMI-HGH
跨导
85
μmho
μA
μA
V
COMI 灌电流
COMI 拉电流
COMI 高压
COMI 低压
25
25
38
38
VEAI=3 V, VCOMI=5 V
VEAI=2 V, VCOMI=0 V
VEAI=2 V
4.7
VCOMI-LOW
VEAI=3 V
0.1
V
过流保护部分
VOCP
VCS过流保护阈值电压
0.60
0.13
0.67
0.18
0.40
0.60
0.74
0.23
V
V
V
V
VLowOCP
VCS低过流保护阈值电压
VLowOCP-EN
启用低过流保护的VS 阀值电压
禁用低过流保护的VS 阀值电压
VLowOCP-DIS
过温保护部分
TOTP
过温保护阈值温度(3)
重新启动结温滞回
140
150
10
160
oC
oC
TOTP-HYS
注:
3. 当过温保护 (OTP) 激活后,电源系统进入自动恢复模式并禁止输出。
© 2012 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FLS3217 / FLS3247 • Rev. 1.0.1
6
典型性能特征
1.5
1.3
1.1
0.9
0.7
0.5
1.5
1.3
1.1
0.9
FLS3217M
FLS3217N
FLS3247N
FLS3217M
0.7
0.5
FLS3217N
FLS3247N
-40
-40
-40
-30
-15
0
0
0
25
50
75
85
100 125
-40
-40
-40
-30
-15
0
0
0
25
50
75
85
85
85
100 125
100 125
100 125
Temp [°C]
Temp [°C]
图5.
VDD-ON与温度的关系
图6.
VDD-OFF与温度的关系
1.5
1.3
1.1
0.9
0.7
0.5
1.5
1.3
1.1
0.9
0.7
0.5
FLS3217M
FLS3217N
FLS3247N
FLS3217M
FLS3217N
FLS3247N
-30
-15
25
50
75
85
100 125
-30
-15
25
50
75
Temp [°C]
Temp [°C]
图7.
IDD-OP与温度的关系
图8.
VAOCP与温度的关系
1.5
1.3
1.1
0.9
0.7
0.5
1.5
1.3
1.1
0.9
0.7
0.5
FLS3217M
FLS3217N
FLS3247N
FLS3217M
FLS3217N
FLS3247N
-30
-15
25
50
75
85
100 125
-30
-15
25
50
75
Temp [°C]
Temp [°C]
图9.
fMAX_CC与温度的关系
图10.
fMIN_CC与温度的关系
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
7
典型性能特征(续)
1.5
1.3
1.1
1.5
1.3
1.1
0.9
0.7
0.5
0.9
FLS3217M
FLS3217M
FLS3217N
FLS3247N
0.7
0.5
FLS3217N
FLS3247N
-40
-30
-15
0
25
50
75
85
100 125
-40
-30
-15
0
25
50
75
85
100 125
Temp [°C]
Temp [°C]
图11.
VCCR与温度的关系
图12.
VCCR与温度的关系
1.5
1.3
1.1
0.9
0.7
0.5
1.5
1.3
1.1
0.9
0.7
0.5
FLS3217M
FLS3217N
FLS3247N
FLS3217M
FLS3217N
FLS3247N
-40
-30
-15
0
25
50
75
85
100 125
-40
-30
-15
0
25
50
75
85
100 125
Temp [°C]
Temp [°C]
图13.
VOCP与温度的关系
图14.
VOCP_Low 与温度对比
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
8
功能说明
FLS3217 / FLS3247 是一种交流-
功率因数校正 (PFC) 和 总体谐波失真 (THD)
直流脉宽调制控制器,用于 LED
在传统升压变换器中,临界导通模式 (BCM)
通常用于保持输入电流与输入电压同相,以控制功率因数
(PF) 和总体谐波失真
照明应用。TRUECURRENT® 技术能够精确控制 LED
电流,不依赖于输入电压、输出电压和电感量变化。振荡
器中的线性频率控制能够减少导通损耗,保持 DCM
模式在宽范围输出电压下运行,在单级反激式拓扑结构下
实现高功率因数校正。诸如 LED
(THD)。在反激式/升降压拓扑中,恒定导通时间和恒定频
率 I 不连续导通模式 (DCM)
可以实现高功率因数和低总谐波失真度,如图 16
所示。恒定导通时间由内部误差放大器以及 COMI
引脚较大的外部电容(通常超过 1
开路/短路保护、过温保护、逐周期限流等一系列保护措
施,能够使系统稳定运行,保护外部元件。
µF)维持。恒定频率和 DCM
启动
运行由线性频率控制来管理。
由于功率因数校正转换器中的反馈回路带宽较低,因此启
动阶段的供能较为缓慢。为了加快启动阶段的供能,内部
振荡器计时 12 ms
作为启动模式。在启动模式中,导通时间取决于电流模式
控制,限制 0.2 V 电压。跨导增强 14
倍,如图所示图15。启动模式后,接通时间由电压模式控
制,即 COMI 电压决定。误差放大器跨导减小到 85
µmho。
VDD = VDD_ON
VIN
VCS
0.2V
图16.
输入电流和切换
14gm gm
VCOMI
线性频率控制
在反激式拓扑中,应当确保工作于DCM模式
以保证达到高功率因数。为了保持
Startup Mode: 12ms
DCM
ILED
在宽范围输出电压下,线性频率控制中的频率应根据输出
VS
电压而发生线性变化。输出电压由辅助线圈和连接
引脚的分压电阻检测,如图所示。图17
Time
图15.
启动顺序
恒流调节
由于输出电流与稳定状态时二极管电流的平均值相等,因
此可以通过峰值漏极电流和电感电流放电时间来估计输出
电流。漏极电流峰值取决于 CS 引脚,电感放电时间
(tDIS) 由 tDIS
探测器检测。通过使用三种数据(峰值漏极电流、电感放
电时间和工作周期),TRUECURRENT综合计算预估输出电
流。TRUECURRENT
计算结果与内部精确基准进行比较,能够生成误差电压
VCOMI,它可以决定电压模式控制中的导通时间。凭借飞兆
公司的创新技术,恒流输出可以实现精确控制。
图17.
线性频率控制
当输出电压降低时,次级二极管传导时间增加,线性频率
控制会延长切换周期。这可以保持 DCM
在宽范围输出电压下运行,如图所示图18。在满载条件下
,频率控制还会调低电流有效值,获得更高效率。
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
9
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5
3
t DIS
图18.
初级电流和次级电流
图20.
LED 短路时的波形
BCM 控制
LED 开路保护
次级二极管导通时间末尾可能超过线性频率控制设定的开
关周期。在这种情况下,FLS3217 和 FLS3247 不会允许
CCM,工作模式会从 DCM 转为 BCM。因此,FLS3217 和
FLS3247 可以消除 CCM 中的次谐波失真。
当发生 LED 开路时,FLS3217 和 FLS3247
可以保护次级端外部元件,例如二极管和电容。开关关闭
期间,VDD电容充电至辅助绕组电压,反映了输出电压。由
于 VDD电压具有输出电压信息,VDD
短路LED保护
引脚的内部电压比较器可以触发输出过压保护
(OVP),如图图21所示。当至少一个 LED
当发生 LED 短路时,开关 MOSFET
发生开路时,输出负载阻抗会变得非常高,输出电容快速
充电至 VOVP x Ns /
和次级二极管通常会经受高强度电流。然而,FLS3217 和
FLS3247 会在 LED 短路时改变过流保护点。当 VS 低于
0.4 V 时,过流保护点会从 0.7 V 降至
0.2 V,如图所示图17。功率受到限制,外部元件电流应
力得到减轻。
Na。随后开关关闭,VDD模块进入“打嗝模式”,直至 LED
开路情况解除,如图图22所示。
Internal
Bias
VDD Good
+
-
VDD
2
VOVP
Shutdown Gate Driver
S
Q
图19.
内部过流保护模块
VDD Good
图21.
R
图20图中显示了 LED 短路时的工作波形。发生 LED
短路时,输出电压迅速降至
内部过压保护模块
0 V。然后反射辅助电压同样变为 0 V,使得 VS 小于
0.4 V。0.2 V
的过流保护点限制了初级端电流,VDD在欠压锁定滞回范围
内上下波动。
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
10
过温保护(OTP)
当结温超过150°C 时,内置温度检测电路会关闭脉宽调
制输出。当脉宽调制输出关闭时,VDD 会逐渐下降至欠压
锁定电压。部分内部电路关闭,VDD 又逐渐升高。当 VDD
升至 16 V 时,所有内部电路开始工作。如果结温仍然高
于 140°C,脉宽调制控制器会立即关闭。
图22.
LED 开路时的波形
欠压锁定(UVLO)
接通和断开阈值分别内固定为 16 V 和 7.5 V。在启动阶
段,VDD 电容必须通过启动电阻充电至 16 V,从而使
FLS32x7 能够工作。VDD 电容供应 VDD,直至能够从主变
压器的辅助线圈供能。在启动阶段,VDD 不可低于
7.5 V。欠压锁定滞回窗口确保了 VDD 电容在启动阶段足
以供应 VDD。
© 2012 Fairchild Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.1
www.fairchildsemi.com
11
10.00
9.10
7
5
6.60
6.20
1
4
0.56
TOP VIEW
7.62
3.60
3.20
5.08 MAX
3.60
3.00
0.35
0.20
0.33 MIN
15°
0°
1.62
1.42
0.56
0.36
9.91
7.62
2.54
7.62
FRONT VIEW
SIDE VIEW
NOTES: UNLESS OTHERWISE SPECIFIED
A. THIS PACKAGE COMPLIES TO JEDEC MS-001,
VARIATION BA, EXCEPT FOR TERMINAL COUNT
(7 RATHER THAN 8)
B. ALL DIMENSIONS ARE IN MILLIMETERS
C. DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD
FLASH, AND TIE BAR PROTRUSIONS.
D. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M-2009
E. DRAWING FILENAME: MKT-NA07BArev3
5.00
4.80
A
3.81
B
5
7 6
1.75 TYP
1.27
3.81
4.00
3.80
6.20
5.80
3.85 7.35
1 2
3
4
PIN #1
1.27
0.25
0.65 TYP
(0.33)
M
C B A
TOP VIEW
LAND PATTERN RECOMMENDATION
B
0.25
0.19
C
1.75 MAX
0.10 C
0.51
0.33
OPTION A
BEVEL EDGE
OPTION B
0.25
0.10
NO BEVEL EDGE
FRONT VIEW
SIDE VIEW
NOTES:
A. THIS PACKAGE DOES NOT FULLY CONFORM
TO JEDEC MS-012, VARIATION AA
B. ALL DIMENSIONS ARE IN MILLIMETERS
C. DIMENSIONS DO NOT INCLUDE MOLD FLASH
OR BURRS
0.50
0.25
x 45
R0.10
R0.10
GAGE PLANE
0.36
D. DRAWING FILENAME: MKT-M07Brev4
8°
0°
0.900
0.406
SEATING PLANE
(1.04)
DETAIL B
SCALE 2:1
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