MC34845DEPR2 Freescale Semiconductor, MC34845DEPR2 Datasheet - Page 6

• Manufacturer Part Number: MC34845DEPR2
• Description: IC LED DVR BACKLIGHT 6CH 24QFN
• Manufacturer: Freescale Semiconductor

Specifications of MC34845DEPR2

• Internal Driver: Yes
• Type - Primary: Backlight
• Mounting Type: Surface Mount
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Frequency: 270kHz ~ 330kHz
• Voltage - Supply: 5 V ~ 21 V
• Voltage - Output: 60V
• Package / Case: 24-UFQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Operating Supply Voltage: 5 V to 21 V
• Maximum Supply Current: 5 mA
• Maximum Power Dissipation: 3.4 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 3. Static and Dynamic Electrical Characteristics (continued)
85°C, unless otherwise noted. Typical values noted reflect the approximate parameter means at T
conditions, unless otherwise noted.
BOOST (CONTINUED)
LED DRIVER
Notes
Line Regulation
Load Regulation
Minimum Duty Cycle
Maximum Duty Cycle
OVP Internally Fixed Value
OVP Programming Range
OVP Reference Voltage
OVP Sink Current
Switching Frequency
Soft Start Time (Fs=600 kHz, 100% PWM duty)
Soft Start VOUT Overshoot (Fs=600 kHz, 100% PWM duty)
Boost Switch Rise Time
Boost Switch Fall Time
Current sense Amplifier Gain
OTA Transconductance
Transconductance Sink and Source Current Capability
Slope Compensation
LED Driver Sink Current
ISET Pin Voltage
Regulated Minimum Voltage Across LED Drivers
LED Current Channel to Channel Tolerance
Characteristics noted under conditions V
9.
ELECTRICAL CHARACTERISTICS
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
6
34845
V
V
(no external voltage resistor divider)
(set through an external resistor divider)
R
R
R
Pulse Width > 400ns
10 mA ≤ I
3.0 mA ≤ I
IN
LED
ISET
ISET
ISET
The OVP level must be set 5.0 V above the worst-case LED string voltage.
= 7.0 V to 21 V, I
= 24 V to 40 V (all Channels), I
= 51 kΩ 0.1%, PWM = 3.3 V
= 5.1 kΩ 0.1%, PWM = 3.3 V
= 5.1 kΩ 0.1%
LED
LED
≤ 30 mA
< 10 mA
CH
(9)
= 30 mA
Characteristic
CH
= 30 mA
IN
= 12 V, V
34845B, 34845D
34945B, 34845D
34845, 34845C
34845, 34845C
34845A
34845A
OUT
= 35 V, I
I
BOOST_t
BOOST_t
TOLERANCE
LED
I
V
V
I
SS_
V
LED
SINK_OVP
Symbol
I
V
LED
OVP_EXT
REF_OVP
OVP_INT
D
V
A
D
V
SLOPE
I
t
G
I
LED
MAX
ISET
CSA
MIN
f
SS
SS
MIN
/V
VOUT
= 30 mA, f
S
/V
M
LED
IN
R
F
S
2.011
0.675
1080
2.88
29.4
Min
-0.2
-0.2
-2.0
-4.0
540
270
6.3
= 600 kHz, f
88
56
15
-
-
-
-
-
-
-
-
-
-
-
-
Analog Integrated Circuit Device Data
2.043
1200
0.52
0.73
0.22
0.75
Typ
600
300
200
100
6.9
0.2
3.0
8.0
6.0
9.0
3.0
10
90
60
30
PWM
-
-
-
-
-
-
A
= 600 Hz - 40°C ≤ T
= 25°C under nominal
Freescale Semiconductor
2.074
0.825
1320
OVP
Max
3.12
30.6
660
330
0.2
0.2
7.5
2.0
4.0
15
64
60
-
-
-
-
-
-
-
-
-
-
-
V/μs
Unit
%/V
%/V
kHz
mA
μA
ms
μS
μA
ns
ns
%
%
%
V
V
V
V
V
V
A
≤