Part Number: LM3409 Other Parts Discussed in Thread: TPS92641 I have a circuit with LV3409 working well. It is essentially the design from EN PIN PWM Dimming Application for 10 LEDs along with IADJ being controlled by a 12-bit DAC.
I have connected a 24V…
Part Number: LM3409 Hello,
I am designing a laser driver that must be able to produce a current between 0.5 and 4 ampere. The first version is heating quite a lot, especially near the mosfet and the re-circulating diode.
I already did some improvement…
Part Number: LM3409 Hi team,
Could you please tell me the behavior when LED is shorted/opened? Specifically, I would like you to answer the following two questions:
(1) How does the LM3409 work if the LED is shorted during operation? (Does LM3409 try…
Part Number: LM3409 Hi Team,
I use the lm3409 to drive an LED. When switching off the PWM at the EN input, a falling curve occurs at the LED, which I cannot prevent. I have specially used a PMOS with small Qg. Can you help me?
Thats the picture in the…
Part Number: LM3409-Q1 Hi Expert,
Our customer has a new request. They want to output 7A current. Is it possible for LM3409-Q1 drive external to achieve that? Do you have related reference design? Thanks.
BR,
Elec Cheng
Part Number: LM3409 Hi team,
My customer is designing PFET with 36nC and LM3409 and has some questions about them.
9.1.8 of the LM3409 datasheet states that if Qg is greater than 30nC and CF is between VIN and VCC, the current detection will be erroneous…
Part Number: LM3409-Q1 Hi team,
Could you help to provide the test data for the below curve, especially for non-linear part in the red circle?
BRs,
Haury
Part Number: LM3409-Q1 Hi Expert
in the EVM:
1. my customer change the parameter is:
Roff: 1K
Coff: 470pf
RSNS: 75mohm
EN PWM: 140HZ
PWM min pulse: 5uS
min stable current: 385mA
customer used internal PWM method, control EN pin.
situation: When external…