データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

TEA1507P データシート(PDF) 9 Page - NXP Semiconductors

部品番号 TEA1507P
部品情報  GreenChipII SMPS control IC
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TEA1507P データシート(HTML) 9 Page - NXP Semiconductors

Back Button TEA1507P Datasheet HTML 5Page - NXP Semiconductors TEA1507P Datasheet HTML 6Page - NXP Semiconductors TEA1507P Datasheet HTML 7Page - NXP Semiconductors TEA1507P Datasheet HTML 8Page - NXP Semiconductors TEA1507P Datasheet HTML 9Page - NXP Semiconductors TEA1507P Datasheet HTML 10Page - NXP Semiconductors TEA1507P Datasheet HTML 11Page - NXP Semiconductors TEA1507P Datasheet HTML 12Page - NXP Semiconductors TEA1507P Datasheet HTML 13Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 20 page
background image
2000 Dec 05
9
Philips Semiconductors
Preliminary specification
GreenChip
™II SMPS control IC
TEA1507
Burst mode standby
Pin CTRL (pin 3) is also used to implement the burst mode
standby. In burst mode standby, the power supply enters
a special low dissipation state, where it typically consumes
less than 1 W of input power (Po < 100 mW), but is still
able to supply a microprocessor, for example. Figure 12
shows a flyback converter using the burst mode standby
function. The system enters burst mode standby when the
microprocessor closes switches S2 and S3 on the
secondary side. Switch S2 connects the high voltage
output secondary winding to the low voltage
microprocessor capacitor (CµC), bypassing Co.
When the voltage on CµC exceeds the Zener voltage, the
opto-coupler is activated, sending a large current signal to
CTRL. In response to this signal, the IC stops switching
and enters a ‘hiccup’ mode. This burst activation signal
should be present for longer than the ‘burst blank’ period
(typically 30
µs): the blanking time prevents false burst
triggering due to spikes. Figure 11 shows the burst-mode
standby signals. The hiccup mode during burst mode
standby operation does not differ from the hiccup mode in
safe-restart mode during a system fault condition (e.g.
OVP or output short circuit). The power is reduced
during soft-restart mode.
Burst mode standby operation continues until the
microcontroller opens switches S2 and S3. The system
then enters the start-up sequence and begins normal
switching behaviour.
(For burst mode specification, see Figs 11 and 12.)
Soft start-up (pin Isense)
To prevent transformer rattle during hiccup, the
transformer peak current is slowly increased by the soft
start function. This can be achieved by inserting a resistor
and a capacitor between pin Isense (pin 5) and the sense
resistor. An internal current source charges the capacitor
to V = Iss × Rss, with a maximum of about 0.5 V.
The start level and the time constant of the increasing
primary current level can be adjusted externally by
changing the values of Rss and Css.
The charging current Iss will flow as long as the voltage on
pin Isense is below approximately 0.5 V. If the voltage on
pin Isense exceeds the 0.5 V, the soft start current source
will start limiting the current Iss. At the VCC(start) level, the Iss
current source is completely switched off (see Fig.9).
Since the soft start current Iss is subtracted from pin VCC
charging current, the Rss value will affect the VCC charging
current level by a maximum of 60
µA (typical value).
Driver
The driver circuit to the gate of the power MOSFET has a
current sourcing capability of typically 125 mA and a
current sink capability of typical 540 mA. This permits fast
turn-on and turn-off of the power MOSFET for efficient
operation.
A low driver source current has been chosen to limit the
∆V/∆t at switch-on. This reduces Electro Magnetic
Interference (EMI) and also limits the current spikes
across Rsense.
I
burstmode
V
th
R
CTRL
-----------------
I
th on
()
+
=
I
primary(max)
V
ocp
I
ss
R
ss
×
()
R
sense
--------------------------------------------
=
τ
R
ss
C
ss
×
=
handbook, halfpage
CSS
RSS
Isense
Rsense
ISS
Vocp
start-up
MGU237
pin 5
0.5 V
Fig.9 Soft start-up.


同様の部品番号 - TEA1507P

メーカー部品番号データシート部品情報
logo
NXP Semiconductors
TEA1501 PHILIPS-TEA1501 Datasheet
116Kb / 20P
   Greeny; GreenChip
1998 Aug 19
TEA1504 PHILIPS-TEA1504 Datasheet
111Kb / 20P
   GreenChip SMPS control IC
1999 Dec 07
TEA1506 PHILIPS-TEA1506 Datasheet
122Kb / 22P
   GreenChip SMPS control IC
2003 Sep 09
TEA1506AP PHILIPS-TEA1506AP Datasheet
122Kb / 22P
   GreenChip SMPS control IC
2003 Sep 09
TEA1506AT PHILIPS-TEA1506AT Datasheet
122Kb / 22P
   GreenChip SMPS control IC
2003 Sep 09
More results

同様の説明 - TEA1507P

メーカー部品番号データシート部品情報
logo
NXP Semiconductors
TEA1654 PHILIPS-TEA1654 Datasheet
119Kb / 24P
   GreenChipII SMPS control IC
2003 May 12
TEA1552 PHILIPS-TEA1552 Datasheet
119Kb / 24P
   GreenChipII SMPS control IC
2002 Aug 27
TEA1833TS PHILIPS-TEA1833TS Datasheet
258Kb / 25P
   GreenChip SMPS control IC
Rev. 1-31 August 2015
TEA1733LT NXP-TEA1733LT Datasheet
149Kb / 21P
   GreenChip SMPS control IC
Rev. 8 ??16 July 2013
TEA1738T NXP-TEA1738T_V01 Datasheet
218Kb / 21P
   GreenChip SMPS control IC
Rev. 2-14 January 2011
TEA1833TS NXP-TEA1833TS_V01 Datasheet
335Kb / 24P
   GreenChip SMPS control IC
Rev. 1.1 - 8 February 2023
TEA18363T NXP-TEA18363T_V01 Datasheet
356Kb / 28P
   GreenChip SMPS control IC
Rev. 1 - 6 March 2023
TEA1533AP PHILIPS-TEA1533AP Datasheet
117Kb / 24P
   GreenChip SMPS control IC
2002 Aug 23
TEA1833LTS PHILIPS-TEA1833LTS Datasheet
255Kb / 24P
   GreenChip SMPS control IC
Rev. 1-31 August 2015
TEA1832TS PHILIPS-TEA1832TS Datasheet
242Kb / 23P
   GreenChip SMPS control IC
Rev. 1-16 December 2014
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com