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| 型号： | KIT34844AEPEVBE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 37/62页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL BOARD 10CH LED BACKLGHT |
| 标准包装： | 1 |
| 系列： | * |
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MC34844A
ELECTRICAL CHARACTERISTICS
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
Table 11. Static and Dynamic Electrical Characteristics
Characteristics noted under conditions V IN = 12 V, V OUT = 42 V, PWM = VDC1, M/~S = VDC1, PIN & NIN = VDC1,
-40 ° C ≤ T A ≤ 105 ° C, PGND = 0 V, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
SUPPLY
Supply Voltage (20)
V IN
7.0
12
28
V
Supply Current when Shutdown Mode
Manual: PWM = Low, EN = Low, SCK & SDA=Low
I SHUTDOWN
μ A
SM Bus: EN bit = 0, SCK & SDA=Low, EN pin= Low
-
2.0
-
I 2 C:
SETI2Cbit=1, CLRI2C=0, EN bit= 0, EN pin = Low
-
17
-
Supply Current when Sleep Mode
I SLEEP
SM-Bus: EN = low, SCK & SDA= Active, SETI2C bit = 0, EN bit = 0
-
4.0
-
mA
I 2 C: EN = High, SETI 2 C bit = 1, CLRI 2 C bit = 0, EN bit = 0
Supply Current when Operational Mode
I OPERATIONAL
Manual: EN= High, SCK & SDA=Low, PWM=Low
-
13.0
-
mA
SM-Bus: EN= Low, SCK & SDA=Active, EN bit= 1, PWM=Low
I 2 C: EN = High, SETI 2 C bit = 1, CLRI 2 C bit = 0, EN bit = 1, PWM=Low
Under-voltage Lockout (V IN Rising)
Under-voltage Hysteresis (V IN Falling)
UVLO
UVLO HYST
5.4
-
6.0
300
6.4
-
V
mV
VDC1 Voltage
V DC1
2.3
2.5
2.75
V
C VDC1 = 2.2 μ F
VDC2 Voltage (18)
V DC2
5.5
6.0
6.5
V
C VDC2 = 2.2 μ F
VDC3 Voltage (18)
V DC3
2.3
2.5
2.75
V
C VDC3 = 2.2 μ F
BOOST
Output Voltage Range (19)(20)
VIN = 7.0 V
VIN = 28 V
Boost Switch Current Limit
Boost Switch Current Limit Timeout
RDSON of Internal FET (I DRAIN = 1.0 A)
Boost Switch Off-state Leakage Current
V OUT1
V OUT2
I FET
t BOOST_TIME
R DSON
I BOOST_LEAK
8.0
32
2.3
-
-
-
-
-
2.5
10
250
-
28
60
2.7
-
500
10
V
A
ms
m Ω
μ A
V SWA,SWB = 65 V
Feedback pin Off-state Leakage Current (V OUT = 65 V )
Peak Boost Efficiency (20)
VOUT LEAK
EFF BOOST
-
-
500
90
700
-
μ A
%
Notes
18. This output is for internal use only and not to be used for other purposes. A 1.0 k Ω resistor between the VDC3 and VDC1 pin is
recommended for <-20 °C operation.
19. Minimum and Maximum output voltages are dependent on Min/Max duty cycle and current limit condition.
20. Guaranteed by design
34844A
Analog Integrated Circuit Device Data
Freescale Semiconductor
37
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