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Philips Semiconductors

Product data

SA58605

Dual operational amplifier and 2.5 V shunt regulator

2003 Nov 12

6

APPLICATION INFORMATION

The SA58605 may be used for various voltage control applications
in which the input threshold voltage exceed 2.5 V for Amp “A” and
154 mV for Amp “B”. When either or both input threshold voltage is
exceeded the output is pulled LOW. The output is connected to V

CC

with a pull-up resistance.

Figure 7 shows the schematic for a Universal Converter/Charger
circuit in which the SA58605 Amp “A” is used to monitor the B+ level
of the converter/charger. Amp “B” input is pulled to ground through a
390 

 resistor and will remain there. The input to the Amp “A” is

maintained at 0.5 

×

 B+ with the voltage divider of the two 1.5 k

resistors. As B+ drops below 5 V, the input to Amp “A” of the

SA58605 follows and drops below 2.5 V. This causes the output
(pin 1) to go HIGH and the LED is turned off. Q1 base drive is
reduced and Q2 is increased. Thus, the PW modulation is
increased, and B+ is able to satisfy the load requirements of the
battery and circuitry. As B+ is increased above 5 V, it causes the
input to Amp “A” to increase above 2.5 V. Then, the output goes
LOW and the LED is activated which turns on the detection diode.
This increases the drive on Q1 and pulls down the base of Q2
reducing it base drive. With Q2 conducting less, the PW modulation
is decreased and B+ is reduced. Under quasi-steady state, B+ is
maintained at 5 V.

D1

D2

0.033 pF

8.2 k

Q1

8.3 

µ

F

/250 V

L1
10 mH

Q2

2.7 k

100 

V

IN

 = 85 – 265 VAC

0.1 

µ

F

100 

MUR160

56 k

0.001 

µ

F

/1 kV

D4

SA58605

5

4

1

3

2

390

Q4

Q3

100 

µ

F

/16 V

800 

µ

F

/8 V

1 M

47 k

D3

100

0.1 

µ

F

0.1 

µ

F

0.22 

390

1.5 k

68 

µ

H

1.5 k

1 k

100 

µ

F

/16 V

B+

GND

SFH615A-4

SR01619

0.022 

µ

F

T1

Figure 7.  Universal converter/charger application.

Components used in Figure 7

D1–D4:

1N5822

Q1–Q4:

2N3904

T1:

Cooper Electronic Technologies
Part#:

CTX22-25348

Primary:

47 YTurns of #29 AWG, Pin 4 = Start, Pin 5 = Finish

Secondary:

5 Turns of 0.40 mm, Pins 1 and 2 = Start, Pins 7 and 8 = Finish

Gap:

Designed for total primary inductance of 1.24 mH

Core:

TSF-7070

Bobbin:

Pins 3 and 6 removed, EE19

Summary of Contents for SA58605

Page 1: ... SA58605 Dual operational amplifier and 2 5 V shunt regulator Product data Supersedes data of 2002 Mar 25 2003 Nov 12 INTEGRATED CIRCUITS ...

Page 2: ...605 incorporates a NOR logic configuration with these specific gate levels SA58605 supports voltage control and sensor applications such as AC adapter switch mode power supply and battery chargers It is available in a 5 lead small outline surface mount package SOP003 FEATURES Low input bias current 30 nA typ Low operating supply current 1 2 mA typ Reference voltages at non inverting inputs Amp A a...

Page 3: ...nate the product The fourth letter represented by x is a date tracking code Part Number Marking SA58605D AJAx PIN CONFIGURATION SL01613 1 2 3 4 5 VCC AIN BIN GND OUT SA58605 Figure 2 Pin configuration PIN DESCRIPTION PIN SYMBOL DESCRIPTION 1 OUT Output 2 GND Ground 3 BIN Amp B inverting input Non inverting input internally set at 154 mV reference voltage 4 AIN Amp A inverting input Non inverting i...

Page 4: ... 2 50 2 55 V Ii bias A Input bias current A BIN 0 V RL 4 3 kΩ 30 150 nA PSSR A PSSR A BIN 0 V RL 4 3 kΩ 62 dB Io sink A Output sink current A AIN 2 7 V BIN 0 V VOUT 1 5 V 5 mA B amplifier Vo B Output inverting voltage B AIN 0 V RL 4 3 kΩ 151 154 157 mV Ii bias B Input bias current B AIN 0 V RL 4 3 kΩ 30 150 nA PSSR B PSSR B AIN 0 V RL 4 3 kΩ 65 dB Io sink B Output sink current B AIN 0 V BIN 0 17 V...

Page 5: ...OFF OFF OFF ON ON OFF ON OFF 4 3 k measure TPA voltage Io sink A Output sink current A OFF OFF OFF OFF OFF OFF ON ON OFF OFF OFF ON 2 7 measure output sink current PSSR A PSSR A OFF ON OFF ON OFF OFF ON ON OFF OFF ON OFF 4 3 k Vo A Note 1 Vo B Output inverting voltage B ON OFF OFF OFF BIN OFF OFF OFF ON ON ON OFF 4 3 k measure TPB voltage Ii bias B Input bias current B OFF OFF OFF OFF OFF OFF OFF ...

Page 6: ...hus the PW modulation is increased and B is able to satisfy the load requirements of the battery and circuitry As B is increased above 5 V it causes the input to Amp A to increase above 2 5 V Then the output goes LOW and the LED is activated which turns on the detection diode This increases the drive on Q1 and pulls down the base of Q2 reducing it base drive With Q2 conducting less the PW modulati...

Page 7: ...uct data SA58605 Dual operational amplifier and 2 5 V shunt regulator 2003 Nov 12 7 PACKING METHOD SL01305 TAPE DETAIL COVER TAPE CARRIER TAPE REEL ASSEMBLY TAPE GUARD BAND BARCODE LABEL BOX Figure 8 Tape and reel packing method ...

Page 8: ...Philips Semiconductors Product data SA58605 Dual operational amplifier and 2 5 V shunt regulator 2003 Nov 12 8 Plastic small outline package 5 leads body width 1 6 mm SOP003 ...

Page 9: ...r contained herein in order to improve design and or performance When the product is in full production status Production relevant changes will be communicated viaaCustomerProduct ProcessChangeNotification CPCN PhilipsSemiconductorsassumesnoresponsibilityorliabilityfortheuseofanyoftheseproducts conveys no license or title under any patent copyright or mask work right to these products and makes no...

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