NP10 Nixie Power Supply module - Part4

這次發表為新一代專為Nixie Tube設計的DC-DC 高壓版
體積非常迷你，只有拇指大小

Input: 3-28VDC

Output:12-250VDC (Adjust by single resister, default:180VDC)

Efficiency: 87% (180V@35mA, Vin=12V)

Power out: 15W (Max Vin=28V)

Output setting:Programmed with a single resistor to ground

Module size: 20mm*16mm*8.5mm

Table 1: Electrical Specifications

Specification	Min	Typ	Max	Units	Notes
Vin*1 (Input Voltage)	---	---	28	Volts
	3	---	---	Volts	Pout < 4.0W
	---	---	28	Volts	Pout<15W
VEN-Thresh*2 (Enable pin)	---	---	0.45	Volts
	2	---	---	Volts
VEN-Current	1.5	---	6.5	uAmps
Shutdown current	---	3.5	6	uAmps
Vout*3	12	---	250	Volts	By single resistor
Efficiency	---	87	---	%	180V@35mA, Vin=12V

Notes:

1.          Include input reverse polarity protection is provide.

2.          Enable pin can floating the pin or connect to MCU. By using this pin for clock synchronization.

3.          Output of module is short circuit protected via pulse-pulse current limiting.

       由於追求體積小的目標，調整電壓必須自行修改電阻值，計算公式很簡單
       可以依照需求自行更換電阻，換取不同的輸出電壓範圍
       設計採用電容耐壓為250V 作基礎，如需要更高的輸出電壓，需要更換1812 size電容
       整流二極體採用 ES1G 可以耐壓400V, 因此NP10 更換電容後有機會可達輸出400V需求

        Fourma: Vout = 1.25*(1+(R1+R3)/R5)
       R1/R2 0805 size;   R5 0603 size

Table 2: Setup output voltage

	R1	R3	R5	Vout
Default	910K	820K	12K	181V
Exp1	910K	820K	200K	12V
Exp2	910K	820K	9.1K	238V

後記: 這是一款高效率DC-DC Step-UP 高壓產生電路，操作時務必做好個人安全保護，通電中不要碰觸任何物件，避免造成觸電