TEA1205 Philips Semiconductors, TEA1205 Datasheet
TEA1205
Available stocks
Related parts for TEA1205
TEA1205 Summary of contents
Page 1
... DATA SHEET TEA1205AT High efficiency DC/DC converter Preliminary specification File under Integrated Circuits, IC03 INTEGRATED CIRCUITS 1998 Mar 24 ...
Page 2
... TEA1205AT SO8 1998 Mar 24 GENERAL DESCRIPTION The TEA1205AT (see Fig. fully integrated DC/DC converter circuit using the minimum amount of external components intended to be used to supply electronic circuits with supply voltages of 3.3 or 5.5 V from NiCd cell batteries or one Li-ion battery at an output power level ...
Page 3
... Mar 24 CONDITIONS VSEL = LOW VSEL = HIGH 1 mA < I < 1 < I < 1 note 1 max connected between pin 7 and pin 6 (ground). lim = 890 the use of R lim lim 3 Preliminary specification TEA1205AT MIN. TYP. MAX. UNIT 5.23 5.55 5.85 V 3.13 3.34 3.54 V 1.6 2.0 2 ...
Page 4
... Acrobat reader. white to force landscape pages to be ... 5 LX I/V CONVERTER TEMPERATURE PROTECTION 20 MHz OSCILLATOR N-type POWER FET sense FET 6 7 GND ILIM P-type POWER FET TEA1205AT START-UP CIRCUIT CONTROL LOGIC AND I IimN MODE GEARBOX TIME ROM COUNTER DIGITAL CONTROLLER VSEL SYNC SHDWN Fig.1 Block diagram. 3 ...
Page 5
... SHDWN 8 shut-down input FUNCTIONAL DESCRIPTION Control mechanism The TEA1205AT DC/DC converter is able to operate in discontinuous or continuous conduction operation. All switching actions are completely determined by a digital control circuit which uses the output voltage level as its control input. This novel digital approach enables the ...
Page 6
... V diode voltage drop (see Fig.8). handbook, halfpage low power mode medium power mode 1 medium power mode 2 low DC current high DC current Fig.3 Coil current waveforms in the various power modes. 6 Preliminary specification TEA1205AT equalling V minus the o i increasing load time MGK924 ...
Page 7
... Fig.4 Response to load increase. maximum positive spread maximum negative spread 7 Preliminary specification TEA1205AT high window limit low window limit time time MGK925 upper specification limit lower specification limit MGM698 ...
Page 8
... PFET dsON(P) 1998 Mar 24 CONDITIONS shut-down mode operational mode note 1 CONDITIONS in free air CONDITIONS VSEL = LOW VSEL = HIGH 1 mA < I < 1 < I < 1 note 1 8 Preliminary specification TEA1205AT MIN. MAX. UNIT 0.2 +6.5 V 0.2 +5 +150 +125 C 3000 +3000 ...
Page 9
... CONDITIONS note 2 notes 2 and 3 notes 2 and 3.3 V mode up to 5.0 V mode lim = 890 V/ R lim 1 V, the quiescent current level of the device will increase. The maximum 3 9 Preliminary specification TEA1205AT MIN. TYP. MAX. 150 200 240 +25 +80 150 165 ...
Page 10
... The dotted line represents the Pulse Frequency Modulation (PFM) and the solid line the Pulse Width Modulation (PWM). Fig.7 Efficiency as a function of load current I 1998 Mar 24 PFM 1 10 PFM Preliminary specification TEA1205AT MGM699 PWM (mA) (2.4 to 3.3 V). L MGM700 PWM 2 ...
Page 11
... Fig.8 Complete application for upconversion. SHDWN pin. TR1, R1 and R2 should be omitted in that case. More application information can be found in the associated application note. and R values of sat DC handbook, halfpage falls below I 11 Preliminary specification TEA1205AT OUT V O SENSE C2 MGM701 SHDWN TR1 2.7 M MGK930 Fig ...
Page 12
... REFERENCES JEDEC EIAJ MS-012AA 12 Preliminary specification detail 1.0 0.7 1.05 0.25 0.25 0.4 0.6 0.039 0.028 0.041 0.01 0.01 0.016 0.024 EUROPEAN PROJECTION TEA1205AT SOT96 ( 0.7 0.1 0 0.028 0.004 0.012 ISSUE DATE 95-02-04 97-05-22 ...
Page 13
... Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds 300 C. When using a dedicated tool, all other leads can be soldered in one operation within seconds between 270 and 320 C. 13 Preliminary specification TEA1205AT ...
Page 14
... Philips customers using or selling these products for use in such applications their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1998 Mar 24 14 Preliminary specification TEA1205AT ...
Page 15
... Philips Semiconductors High efficiency DC/DC converter 1998 Mar 24 NOTES 15 Preliminary specification TEA1205AT ...
Page 16
... Tel. +46 8 632 2000, Fax. +46 8 632 2745 Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH, Tel. +41 1 488 2686, Fax. +41 1 488 3263 Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1, TAIPEI, Taiwan Tel. +886 2 2134 2865, Fax. +886 2 2134 2874 Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Tel ...