kiyoukan
0
- Joined
- Oct 24, 2009
- Messages
- 2,555
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- 48
So i have been building a driver.
The driver uses 2 3.5V or 3.7V battery's.
Has a v drop of 0.5v at 2A and even less at 1.5A
Also the heat generation at 1.5a is not to bad.
I have prototyped a version of the driver its single sided.
As you can see it uses no high wattage resistors or parts.
It uses all 805smd components. except for the main chip powerso-10 package.
I am looking for some help.
I can lay out the design but i do not know all the tricky rules like signal trace size or corners and angles and ground planes.
I am looking for someone who is knows there way around pcb layouts.
I want this to be the best it can be.
Also if you know a good place to get the boards made please post that as well.
Chip data.
below
constant current source designed to provide a precise constant current starting from a varying input voltage source. The main target is to replace discrete components solution for driving LEDs in low voltage applications such as 5 V, 12 V or 24 V giving benefits in terms of precision, integration and reliability.
The current is set with external resistor up to 2 A with a ± 10 % precision; a dedicated pin allows implementing PWM dimming. An external capacitor allows setting the slope for the current rise from tens of microseconds to tens of milliseconds allowing reduction of EMI.
An open-drain pin output provides information on load disconnection condition.
* Up to 40 V input voltage
* Less than 0.5 V voltage overhead
* Up to 2 A output current
* PWM dimming pin
* Shutdown pin
* LED disconnection diagnostic
* Slope control with external cap
Best of all no high powered resistors or anything needed. i have one of these in my scanners and im using it as TTL works great.
They say 2A but i keep them at 1.5A
And the slope or slow increase in power to the laser when its first turned on is an amazing feature that will prolong the life more than most other drivers
current board layout.
Chip mounted back side.
omitted reverse protection but would like to have it added back this was for beta testing as the part was not in at the time.
The driver uses 2 3.5V or 3.7V battery's.
Has a v drop of 0.5v at 2A and even less at 1.5A
Also the heat generation at 1.5a is not to bad.
I have prototyped a version of the driver its single sided.
As you can see it uses no high wattage resistors or parts.
It uses all 805smd components. except for the main chip powerso-10 package.
I am looking for some help.
I can lay out the design but i do not know all the tricky rules like signal trace size or corners and angles and ground planes.
I am looking for someone who is knows there way around pcb layouts.
I want this to be the best it can be.
Also if you know a good place to get the boards made please post that as well.
Chip data.
below
constant current source designed to provide a precise constant current starting from a varying input voltage source. The main target is to replace discrete components solution for driving LEDs in low voltage applications such as 5 V, 12 V or 24 V giving benefits in terms of precision, integration and reliability.
The current is set with external resistor up to 2 A with a ± 10 % precision; a dedicated pin allows implementing PWM dimming. An external capacitor allows setting the slope for the current rise from tens of microseconds to tens of milliseconds allowing reduction of EMI.
An open-drain pin output provides information on load disconnection condition.
* Up to 40 V input voltage
* Less than 0.5 V voltage overhead
* Up to 2 A output current
* PWM dimming pin
* Shutdown pin
* LED disconnection diagnostic
* Slope control with external cap
Best of all no high powered resistors or anything needed. i have one of these in my scanners and im using it as TTL works great.
They say 2A but i keep them at 1.5A
And the slope or slow increase in power to the laser when its first turned on is an amazing feature that will prolong the life more than most other drivers
current board layout.
Chip mounted back side.
omitted reverse protection but would like to have it added back this was for beta testing as the part was not in at the time.
Last edited:
Looking good!
