Re: undervoltage lockout for flyback powersupply input

On Mon, 03 Dec 2007 14:14:54 -0600, John Fields
<jfields@xxxxxxxxxxxxxxxxxxxxx> wrote:

On Mon, 03 Dec 2007 14:04:56 -0600, John Fields
<jfields@xxxxxxxxxxxxxxxxxxxxx> wrote:


.FROM +V>---+----------------+
. |5%,2W |1%
. [150K] [7.5M]
. | |
. +----------------|-----+ TO Q3 BASE
. | | | |
. | | 5 |
. +--[909K]--+-----|---4|-\LT1716 C
. | 1% | | | >1----[100K]--B 2N3904
. |K |1% +---3|+/ 5% E
. [LN4040] [100K] |1% 2 |
. |10V | [100K] | |
. | | | | |
.GND>-------+----------+-----+-----+-----------------+

---
oOPS...

That 100k 5% resistor ought to be 200k, 5%.

---
Better yet:


..FROM +V>---+----------------+
.. |5%,1W |1%
.. [300K] [7.5M]
.. | |
.. +----------------|-----+
.. | | |
.. | | 5
.. +--[909K]--+-----|---4|-\LT1716
.. | 1% | | | >1----> TO Q3 BASE
.. |K |1% +---3|+/
.. [LM4040] [100K] |1% 2
.. |10V | [100K] |
.. | | | |
..GND>-------+----------+-----+-----+


--
JF
.