FAN5343UMPX [ONSEMI]
集成肖特基二极管和单线数字接口的串联升压 LED 驱动器;
| 型号： | FAN5343UMPX |
| 厂家： | 
ONSEMI |
| 描述： | 集成肖特基二极管和单线数字接口的串联升压 LED 驱动器 驱动 肖特基二极管 驱动器 |
| 文件： | 总13页 (文件大小：1576K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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August 2010
FAN5343
6-LED系列集成肖特基二极管和单线数字接口的升压 LED 驱动器
产品特性
说明
.
异步升压变换器
OUT 可达 24V
FAN533 为异恒流ED驱动器，可以向6个串联的LED提供
最高达500mW功率。优化设计更适用于小型装置，
1.2MHz固定开关频率从而允许使用较小的芯片电感和电
容。
V
.
.
.
.
内置肖特基二极管
输出功率可达500mW
AN5343采用单线数控接口，可通过数字脉冲对LED的亮度
进行3级线性调整。
输入电压范围：2.7V－5.5V
单线数控接口，可设置LED亮度等级
安全方面，器件整合了过压、过流、短路检测和热关断保护功
能。此外，若电池电压过低将触发输入欠压闭锁保护。
32级线性调整
.
.
.
.
.
.
.
固定开关频率：1.2MHz
软启动
FAN5343实现了超小型封装，2mm x 2mm x 0.55mm 6引脚U
型封装符合环保和 RoHS的要求。
输入欠压锁定(UVLO)
输出过压保护 (OVP)
短路检测
热关闭保护（）TSD
小型 6引脚 2.0 x 2.0 型封装MLP
适用范围
.
.
.
.
移动电话
移动互联网设备
便携式媒体播放器
PDA、DSC、MP3 播放器
订购信息
器件型号
温度范围
封装
包装
卷带
FAN5343UMPX
-40 至 +85°C
6-引脚超薄模塑无铅封装(UMLP)
© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
典型应用图
L = 10µH
L1
VIN
SW
2
6
3
5
1
4
2.7V to 5.5V
CIN = 10µF
GND
EN
VOUT
FAN5343
COUT = 1µF
FB
5 – 6 LEDs
RSET = 12.4 @ ILED =20mA
RSE= 10.0 @ ED =25mA
ure 1. 典型应用
框图
5
1
SW
2
GATE
DRIVE
D1
VOUT
6
3
GND
EN
BOOST
CONTROL
OVP/
SCD
REN
Digital I/F
4
FB
Figure 2. 框图
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
2
引脚布局
VOUT 1
6 GND
P1
GND
2
3
5
VIN
EN
SW
FB
4
Figure 3. UMP封装(顶视图)
引脚说明
引脚号
名称
明
1
2
3
VOUT 升压输出电压。稳压。LED连接到该引脚。连接 COUT接地。
VIN
EN
输入电压。连电地去耦合。CIN
启用亮制。采用数脉冲驱动该引脚可编制亮度等级。
电压稳压器可将该引脚的电压调至0.25V，以控制LED的串行电流。将该引脚连接GND和LED
串阴极流设置电阻（RST）。
4
FB
5
6
SW
节点感L1在VIN和SW引脚之间。
直接限制于GND。
GN
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
3
绝对最大额定值
如果应力超过绝对最大额定值，器件就会毁损。在推荐的工作条件之上，该器件可能无法正常运行或操作，且不建议让器件在这
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额定应力值。
符号
参数
最小值
–0.3
最大值
6.0
单位
V
VIN
VIN引脚上的电压
V
FB、VEN FB与EN引脚电压
–0.3
VIN + 0.3
25
V
VSW
SW引脚上的电压
–0.3
V
VOUT
VOUT引脚上的电压
–0.3
25
V
人体模型满足
JESD22-A114
3.3
2.0
ESD
静电放电防护等级
kV
充电器件模型
JESD22101
TJ
TSTG
TL
结温
–40
–65
+150
+150
+260
°C
°C
°C
存储温度
引线焊接温度，10秒
推荐工作条件
推荐的操作条件表定义了真实器件的工作条的工作条件，以确保设备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，也不能按照绝对进行设计。
符号
VIN
参数
工作条件
最小值
2.7
最大值
5.5
单位
V
V
V
V
IN 电源电压
OUT 电压(1)
OUT负载电流
6.2
24.0
25
V
VOUT
IOUT
TA
5
mA
°C
°C
500mW 最大输出功率
–40
–40
+85
环境
结
+125
TJ
说明：
1. 应用必须确保最大和最小占空比在20-85%间，方可满足指定范围。
热性能
结-环境之间热阻与具体应用和电路板布局有关。该数据由2s2p四层板测得，符合JESD51-JEDEC标准。特别注意的是，不要超
过给定环境温度TA时的结温 TJ(max)
。
符号
参数
典型值
单位
结-环境之间热阻
70
°C/W
JA
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
4
电气规格
VIN = 2.7V 至 5.5V, TA = -40°C至 +85°C，除非另有说明。典型值测量条件为 TA = 25°C 且 VIN = 3.6V。
符号
参数
工作条件
最小值
典型值 最大值 单位
电源
ISD
停机电源电流
欠压闭锁阈值
EN = GND, VIN = 3.6V
0.30
2.35
2.15
250
0.75
2.60
2.40
A
V
V
IN 升
IN 降
2.10
1.90
VUVLO
V
V
VUVHYST 欠压锁定滞环宽度
EN:启用引脚
mV
VIH
VIL
输入电压高电平
输入电压低电平
EN 下拉电阻
1.2
V
V
0.4
400
REN
200
0.5
0.5
1
300
k
µs
µs
ms
tLO
EN 低电平 调光时间
压差延时
VIN = 3.6V; 参图14
300.0
tHI
VIN = 3.6V; 见图4
TSD
EN 低电平，关断脉冲宽度
VIN = 3.6V；自 N 的降沿
反馈和参考
= 20A -40°C 至 +85°C,
VIN 5.5V
VFB
反馈电压
237
250
0.1
263
1.0
mV
IFB
反馈输入电流
50mV
A
电源输出
VIN = 3.6V, ISW = 100mA
VIN = 2.7V, ISW = 100mA
600
650
RDS(ON)_Q1 升压开关接通电阻
ISW(OFF) SW 节点漏电
m
EN = 0, VIN = V= VOUT = 5.5V,
VLED = 0
0.1
2.0
1.4
A
ILIM-PK
振荡器
fSW
升压开电流
VIN = 3.6V
750
mA
升压稳率
1.0
1.2
MHz
输出和保护
升压输出过压保护 (OVP)
OVP 滞环
22.5
24.5
1.0
VOVP
V
VTLSC
VTHSC
DMAX
DMIN
V
OUT 短路检测阈值
V
OUT 降
OUT 升
VIN – 1.4
VIN – 1.2
V
V
VOUT 短路检测阈值
V
最大升压占空比(,4)
最小升压占空比(3,4)
热关闭
85
%
%
°C
°C
20
TTSD
150
35
THYS
热关闭滞环宽度
说明:
2. SW 漏电流包括包括 两个内部开关的漏电流；SW 至 GND 与 SW 至 VOUT。
3. 未经产品测试；由设计保证
4. 应用必须确保最大和最小占空比在20-85%之间，方可满足指定范围。
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
5
典型特性
VIN = 3.6V, TA = 25C, ILED = 25mA, L = 10µH, COUT = 1.0µF
6 LED
6 LED
L = 10µH
COUT = 1.0µF
L = 10µH
COUT = 1.0µF
ILED = 25mA
Figure 4. 6 LED：效率 vs LED 电流 vs. 输入电压
Figure 5. 频率 vs.输入电压vs.温度
0.8
0.6
0.4
0.2
0
5 LED
L = 10µH
COUT = 1.0µF
-0.2
-0.4
-0.6
-40°C
+25°C
+85°C
2.7
3
3.3
3.6
3.9
4.2
Input Voltage (V)
Figure 7. VFB输入电压过压和温度的变量，6 LED，L=10µH
且 COUT=1.0µF
Figure 6. 5 LED：效率 vs LED 电流 vs输入电压
6 LED
L = 10µH
COUT = 1.0µF
ILED = 25mA
6 LED
L = 10µH
COUT = 1.0µF
ILED = 25mA
Figure 8. 效率 vs.输入电压vs.温度
Figure 9. 过压保护 vs. 输入电压
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
6
典型特性
VIN = 3.6V, TA = 25C, ILED = 25mA, L = 10µH, COUT = 1.0µF
Figure 10. 6 LED 的线性瞬态响应
Figure 11. FAN5343 的调光操作
Figure 12. 6 LED 的开关电压，电感电流的启动波形，VFB，以
及 EN
Figure 13. 6 LED 的 VOUT
开关电压，电感电流的稳态波形
,
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
7
功能说明
概述
数字调光控制
FAN5343 是一款电感电流模式升压的串联 LED 驱动器，
通过保持RSET电阻 0.25V 的电压实现LED电流的调节。
LED 串的电流（ILED）的计算公式为：
FAN5343 开始以最高亮度等级驱动LED。启动后，控制逻辑可
接受编程脉冲通过施加在 EN 引脚的正端来逐步降低。图14 显
示了FAN5343 的数字脉冲的调光控制。
0.25
ILED
=
过流和短路检测
(1)
RSET
升压模式工作期间，采用逐周期峰值电流限值~750mA，以保护
开关元件和检测元件免受损坏。
电压 VOUT 取决于每个LED上正向电压之和，再加上保持为
250mV的RSET上的压降。
过压/开路保护
UVLO 和软启动
若 LED 采用开，F保持为 0V，且输出电压在没有过压保
护（V）电路的情况下持续升高。当 VO超过24.5V 时，
FAN5343 OVP电路将禁用升压稳压器并持续到VOUT降至
2.5V以下方可启用。
若 EN 低电平超过 1ms,芯片在 EN 升高时将进行一次 “冷启
动” 软起动周期，前提是VIN 高于 UVLO 阈值。
数字接口
关闭
FAN5343采用单线数控接口，可通过数字脉冲对LED的亮
度进行32级线性调整。采用单线解决方案，FAN534就不
再需要系统处理器持续提供信号来驱动LED。
晶圆温度超过150°C时，发生复位并持，直至晶圆冷却至
15°C；此时允许电路开始起动序列。
tSD
tHI
tL
EN
28
3
4
29
30
31
0
1
0
Lev
Level 32: 100%
31
Level 31
Level 30
Level 29
Level 28
Level 5
Shutdown
Level 4
Shutdown
Level 3
Level 2
Level 1
IWLED
Figure 14. 数字脉冲调光控制图
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
8
应用信息
电感和输出电容的选择
Table 1. 建议使用的外部器件
LED 编号
L
器件型号
生产厂商
Min. COUT
器件型号
生产厂商
LQH43MN100K03
NLCV32T-100K-PFR
VLF3010AT-100MR49-1
Murata
TDK
5, 6
10.0µH
1.00µF
UMK212BJ105KG
Taiyo Yuden
TDK
推荐的器件和PCB布局
Figure 15. 推荐的器件布局
输入电容
PCB推荐布局
在典型应用中，输入和输出电容应尽量靠近芯片，实现正常
功能无需其他电容。但是，在测试环境中，若FAN5343通
过较长的电缆供电，需要附加的输入电容（10µF）来保证
功能稳定。这个电容应靠近电源线与 FAN5343评估板的连
接处放置。
. 电感应连接至 VIN，必要时可通过其他层。
. 反馈引脚可返回连接至IC下一层。
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
9
物理尺寸
0.10 C
A
2.0
2X
B
1.45
2.0
(0.25)
PIN1
IDENT
0.10 C
0.80 1.80
2X
6X
TOP VIEW
0.65
0.35
X
0.55 MAX
A
0.10 C
0.08 C
RECOMMENDED LAND PATTERN
(0.15)
0.05
0.00
SEATING
PLANE
SIDE VIEW
NOTES:
A. PACKAGE CONFORMS TO JEDEC MO-229
EXCEPT WHERE NOTED.
5
PIN1
3
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994.
0.70
0.80
0.25
D. LANDPATTERN RECOMMENDATION IS BASED
ON FSC DESIGN ONLY.
6X
0.10 C A B
0.05 C
E. DRAWING FILENAME: MKT-UMLP06Erev2.
4
6
0.65
0.35
0.25
6X
BOTTOM IEW
Figure 16. 6-引脚超薄模塑无铅封装(U)MLP
封装图纸是作为一项服务，提供给考虑飞兆半导体产品的客户。具体参数可进行改动，且无需做出相应通知。请注意图纸上的版本和/或日期，
并联系飞兆半导体代表核实或获得最新版本。封装规格并不超出飞兆公司全球范围内的条款与条件，尤其指保修，保修涉及飞兆半导体的全部产
品。
随时访问飞兆半导体在线封装网页，可以获得最新的封装图:
http://www.fairchildsemi.com/packaging/。
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
10
©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
11
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coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. 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.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor 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. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor 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 ON Semiconductor products for any such unintended or unauthorized
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