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参数资料
| 型号： | MC34848EPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 9/38页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR BACKLIGHT 8CH 48QFN |
| 产品变化通告： | AMPD Product Discontinuation 12/Dec/2012 |
| 标准包装： | 2,000 |
| 恒定电流： | 是 |
| 恒定电压： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 频率： | 200kHz ~ 1.2MHz |
| 电源电压： | 2.6 V ~ 3.6 V |
| 输出电压： | 45V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN-EP（7x7） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
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ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. Dynamic Electrical Characteristics
Characteristics noted under conditions V IN = 24 V, V PVCC = 12 V, V DVDD = 3.3 V, I LED = 70 mA (Local Dimming Mode);
140 mA (Scan Mode), f S = 700 kHz, f PWM = 660 Hz, GND = 0 V unless otherwise noted. Typical values noted reflect the
approximate parameter means at T A = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
BOOST CONVERTER
Minimum duty cycle
Maximum duty cycle
D MIN
D MAX
25
-
-
-
75
98
ns
%
Switching Frequency
f S
kHz
F = 000
F = 001
F = 010
F = 011
F = 100
F = 101
F = 110
F = 111
160
240
320
400
480
560
720
960
200
300
400
500
600
700
900
1200
240
360
480
600
720
840
1080
1440
Soft Start Period
t SS
-
20
-
ms
SW Drive
SW DR
ns
Rise time (10% to 90%), C LOAD = 1.2 nF, VSW = 6.0 V, R SLEW = 4.7 k Ω
Fall time (90% to 10%), C LOAD = 1.2 nF, VSW = 6.0 V, R SLEW = 4.7 k Ω
-
-
12.5
16.5
-
-
PWM GENERATOR
RESET_SCAN Frequency
frequency (8)
PWM
F RESET_SCAN
f PWM
80
120
180
Hz
Hz
P = 0000000000
F RESET_SCAN = 80 Hz
F RESET_SCAN = 120 Hz
F RESET_SCAN = 180 Hz
112
168
253
118
177
266
124
186
279
P = 1111111111
F RESET_SCAN = 80 Hz
F RESET_SCAN = 120 Hz
F RESET_SCAN = 180 Hz
PWM Synchronization Frequency (8)
f PWM = 177 Hz
f PWM = 1200 Hz
f SYNC_PWM
760
1140
1710
172
1166
800
1200
1800
181
1228
840
1260
1890
190
1289
kHz
LED CURRENT DRIVER
Channel Rise Time - 10% to 90%, I LED_PEAK = 70 mA
Channel Fall Time - 90% to 10%, I LED_PEAK = 70 mA
t R
t F
-
-
-
-
200
200
ns
ns
Notes
8. For Slave mode, the IC to IC matching is under ±1%
34848
Analog Integrated Circuit Device Data
Freescale Semiconductor
9
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