DEVICE VARIATIONS
DEVICE VARIATIONS
MC34844 is within the MC34844 Specifications Pages 4 to 31 , MC34844A is within the MC34844A Specifications Pages 32
Table 1. Key Device Variations between the MC34844 and MC34844A
Electrical Parameter (1)
Condition
Value
Unit
Maximum LED Current
34844
34844A
55
85
mA
LED Channel Sink Current
(typ)
mA
34844
34844A
RISET=5.1 k Ω ± 0.1%
RISET=3.48 k Ω ± 0.1%
50
80
Switching Frequency
(typ)
MHz
34844
34844A
PWM Frequency Range
34844
34844A
(BST [1:0]=0)
(BST [1:0]=1)
(BST [1:0]=2) [default]
(BST [1:0]=3)
(BST [1:0]=0)
(BST [1:0]=1)) [default]
(BST [1:0]=2)
(BST [1:0]=3)
This frequency range applies for Master
mode, Slave mode, and Manual mode
0.15
0.30
0.60
1.20
0.16
0.32
0.65
1.30
100 - 25000
110 - 27000
Hz
Notes
1. Refer to the respective Electrical Parameters for specific details
34844
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
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