LM3424MH/NOPB National Semiconductor, LM3424MH/NOPB Datasheet - Page 34

• Manufacturer Part Number: LM3424MH/NOPB
• Description: IC LED DVR BUCK/BOOST 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: High Power, Constant Currentr

Specifications of LM3424MH/NOPB

• Constant Current: Yes
• Topology: Flyback, PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 2MHz
• Voltage - Supply: 4.5 V ~ 75 V
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 96%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3424MH

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15. SOFT-START
Solve for t
If t
DESIGN #1 Bill of Materials
Qty
1
1
2
1
4
4
1
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
1
1
1
SU
is less than t
SU
:
TSU
, solve for t
Part ID
LM3424
C
C
C
C
C
C
C
D1
L1
Q1
Q2
R
R
R
R
R
R
R
R
R
R
R
R
R
R
NTC
BYP
CMP
FS
IN
O
OV
REF
BIAS
CSH
FS
GAIN
HSP
LIM
OV1
OV2
REF1
SLP
SNS
T
UV1
UV2
, C
, R
, C
, R
SU-SS-BASE
SS
HSN
NTC
REF2
:
Part Value
Boost controller
2.2 µF X7R 10% 16V
0.33 µF X7R 10% 25V
0.27 µF X7R 10% 25V
4.7 µF X7R 10% 100V
10 µF X7R 10% 50V
47 pF COG/NPO 5% 50V
1 µF X7R 10% 25V
Schottky 100V 12A
33 µH 20% 6.3A
NMOS 100V 32A
PNP 150V 600 mA
24.3 kΩ 1%
12.4 kΩ 1%
10Ω 1%
6.81 kΩ 1%
1.0 kΩ 1%
0.04Ω 1% 1W
15.8 kΩ 1%
499 kΩ 1%
49.9 kΩ 1%
16.5 kΩ 1%
0.1Ω 1% 1W
14.3 kΩ 1%
21 kΩ 1%
150 kΩ 1%
Thermistor 100 kΩ 5%
34
Solve for C
The chosen component from step 15 is:
Manufacturer
NSC
MURATA
MURATA
MURATA
TDK
TDK
AVX
MURATA
VISHAY
COILCRAFT
FAIRCHILD
FAIRCHILD
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
TDK
SS
:
Part Number
LM3424MH
GRM21BR71C225KA12L
GRM21BR71E334KA01L
GRM21BR71E274KA01L
C5750X7R2A475K
C4532X7R1H106K
08055A470JAT2A
GRM21BR71E105KA01L
12CWQ10FNPBF
MSS1278-333MLB
FDD3682
MMBT5401
CRCW080524K3FKEA
CRCW080512K4FKEA
CRCW080510R0FKEA
CRCW08056K81FKEA
CRCW08051K00FKEA
WSL2512R0400FEA
CRCW080515K8FKEA
CRCW0805499KFKEA
CRCW080549K9FKEA
CRCW080516K5FKEA
WSL2512R1000FEA
CRCW080514K3FKEA
CRCW080521K0FKEA
CRCW0805150KFKEA
NTCG204H154J