MC34845DEPR2 Freescale Semiconductor, MC34845DEPR2 Datasheet - Page 5

• 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
85°C, unless otherwise noted. Typical values noted reflect the approximate parameter means at T
conditions, unless otherwise noted.
Analog Integrated Circuit Device Data
Freescale Semiconductor
SUPPLY
BOOST
Notes
Supply Voltage
Supply Current when in Shutdown Mode
Supply Current when Operational Mode
Under-voltage Lockout
Under-voltage Hysteresis
VDC1 Voltage
VDC2 Voltage
Output Voltage Range
Boost Switch Current Limit
Boost Switch Current Limit Timeout
RDSON of Internal FET
Boost Switch Off state Leakage Current
Feedback pin Off-state Leakage Current
Peak Boost Efficiency
Characteristics noted under conditions V
6.
7.
8.
EN = Low, PWM = Low
Boost = Pulse Skipping, Channels = 1% of Duty Cycle
EN = High, PWM = Low
V
V
C
C
VIN = 5.0 V
VIN = 21 V
I
V
V
V
DRAIN
IN
IN
SWA,SWB
OUT
OUT
VDC1
VD2C
This output is for internal use only and not to be used for other purposes
Minimum and maximum output voltages are dependent on Min/Max duty cycle condition.
Boost efficiency test is performed under the following conditions: f
external components are used: L = 10
Rising
Falling
= 60 V
= 33 V, RL = 330 Ω
= 1.0 A
= 2.2 μF
= 2.2 μF
= 60 V
(6)
(6)
(V
IN
between 7.0 and 21 V)
(8)
(7)
Characteristic
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
μ
34845, 34845A, 34845C
H DCR = 0.1 Ω, C
IN
= 12 V, V
34845B, 34845D
OUT
OUT
= 35 V, I
= 3x1
SW
I
I
I
= 600 kHz, V
OPERATIONAL
t
I
BOOST_LIMIT
BOOST_LEAK
UVLO
BOOST_TIME
VOUT
μ
EFF
LED
SHUTDOWN
Symbol
F (ceramic), Schottky diode V
R
V
V
UVLO
V
V
DSON
V
OUT1
OUT2
DC1
DC2
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
BOOST
= 30 mA, f
IN
HYST
LEAK
IN
= 12 V, V
S
Min
5.0
4.0
2.4
5.7
8.0
1.9
2.1
= 600 kHz, f
24
-
-
-
-
-
-
-
-
OUT
= 33 V and R
ELECTRICAL CHARACTERISTICS
0.25
2.35
F
Typ
300
2.0
5.0
2.5
6.0
2.1
10
10
90
= 0.35 V.
PWM
-
-
-
-
-
A
= 600 Hz - 40°C ≤ T
= 25°C under nominal
L
= 330 Ω. The following
Max
520
500
6.5
4.4
2.6
6.3
2.3
2.6
1.0
21
10
43
60
-
-
-
Unit
mΩ
mA
ms
μA
μA
μA
%
V
V
V
V
V
V
A
34845
A
5
≤