LM3429MH National Semiconductor, LM3429MH Datasheet - Page 23
LM3429MH
Manufacturer Part Number
LM3429MH
Description
IC, LED DRIVER, CNTRL, 14TSSOP
Manufacturer
National Semiconductor
Datasheet
1.LM3429MHNOPB.pdf
(34 pages)
Specifications of LM3429MH
Led Driver Application
Automotive, General Illumination
No. Of Outputs
1
Output Current
1A
Input Voltage
4.5V To 75V
Dimming Control Type
Analogue / PWM
Topology
Boost, Buck, Buck-Boost, SEPIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM3429MH
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM3429MHX/NOPB
Manufacturer:
NS/TI
Quantity:
360
Part Number:
LM3429MHX/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
3. AVERAGE LED CURRENT
Solve for R
Assume R
The closest standard resistor for R
R
The chosen components from step 3 are:
4. INDUCTOR RIPPLE CURRENT
Solve for L1:
The closest standard inductor is 33 µH therefore the actual
Δi
Determine minimum allowable RMS current rating:
The chosen component from step 4 is:
HSP
L-PP
is actually 1 kΩ therefore I
is:
CSH
SNS
:
= 12.4 kΩ and solve for R
LED
SNS
is:
is actually 0.1Ω and for
HSP
:
23
5. OUTPUT CAPACITANCE
Solve for C
The closest standard capacitor is 6.8 µF therefore the actual
Δi
Determine minimum allowable RMS current rating:
The chosen components from step 5 are:
6. PEAK CURRENT LIMIT
Solve for R
The closest standard resistor is 0.04 Ω therefore I
The chosen component from step 6 is:
7. LOOP COMPENSATION
ω
ω
P1
Z1
LED-PP
is approximated:
is approximated:
is:
O
LIM
:
:
www.national.com
LIM
is: