ETC B34063AP 1.5amp dc-to-dc converter control circuit Datasheet

Bay Linear
Inspire the Linear Power
B34063A
1.5Amp DC-to-DC Converter Control Circuit
Description
Features
The Bay Linear B34063A series is monolithic control circuit
containing the primary functions required for DC-to-DC
converters. These devices consist of an internal temperature
compensated reference, comparator, controlled, duty cycle
oscillator with an active current limit circuit, driver and high
current output switch.
This series was specially designed to be incorporated in StepDown and Step-Up and voltage-inverting applications with a
minimum number of external component.
The B34063A is offer in 8-pin DIP or Surface mount package.
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Operation from 3.0V to 40V input
Low Standby Current
Current Limiting
Output Switch Current to 1.5A
Output voltage Adjustable
Frequency Operation to 100 kHz
Precision 2% Reference
Step-Up-Step Down or inverting Switching
regulator
Direct Replacement for MC34063
Applications
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Pin Connection
CD ROM
Mother Board
SMPS Power Supply
Ordering Information
SO-8
8-pin
B34063AM
B34063AIM
B34063AEM
P-DIP
8-pin
Operating
Temp. Range
B34063AP
B34063AIP
B34063AEP
0°C to 70°C
-40°C to 85°C
-40°C to 125°C
All Marking will be B34063X. The Temperature will be specified
in out side Box. X=Package type
8-Pin Surface Mount
Switch
Collector
1
8
Driver
Collector
Switch
Emitter
2
7
IPK Sense
Timing
Capacitor
3
6
VCC
GND
4
5
Comparator
Inverting Input
Top View
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
Absolute Maximum Rating
Parameter
Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage
Switch Collector to Emitter
Voltage
Driver Collector Voltage
Switch Current
Symbol
Value
Unit
VCC
VI(COMP)
VC(SW)
VE(SW)
VCE(SW)
40
-0.3 ∼ + 40
40
40
40
V
V
V
V
V
VC(DR)
ISW
40
1.5
V
I
Electrical Characteristics
(VCC = 5.0V, TA = TLOW to THIGH (Note 3), unless otherwise specified)
Parameter
Symbol Conditions
OSCILATOR
Charging Current
Discharging Current
Frequesncy
Discharge in To Charge
Current Ratio
Current Limit Sense Voltage
ICHG
IDISHG
fOSC
K
VSENSE(C.L)
VVV=5 to 40V, TA = 25 °C
VCC = 5 to 40V, TA = 25 °C
TA = 25 °C
V7 = VCC
TA = 25 °C
ICHG = IDISCHG, TA = 25 °C
MIN
TYP
MAX
UNIT
24
140
24
5.2
35
220
33
6.5
42
260
42
7.5
µA
µA
kHz
-
250
300
350
mV
-
1.0
1.3
V
50
-
0.45
75
40
0.7
100
V
µA
1.225
1.21
1.25
1.275
1.29
V
-
1.4
1.4
-20
5.0
6.0
-400
mV
-
4.0
mA
OUTPUT SWITCH (Note 4)
Saturation Voltage
Darlington Connection
Saturation Voltage (Note 5)
DC Current Gain
Collector off Sate Current
COMPARATOR
Threshold Voltage
VCE(SAT)1
Threshold Voltage Line Reg.
B34063A, B34063AI
B34063AE
Input Bias Current
TOTAL DEVICE
Supply Current
∆VTH
TA = 25 °C
TA= TLOW to Thigh
VCC = 3V to 40V
IBIAS
VI = 0V
VCE(SAT)2
GI(DC)
IC(OFF)
VTH
ICC
ISW = 1.0A, Pins 1, 8 connected
VC(drive) = VC(SW)
ISW = 1.0A, VC(drive) = 50mA
ISW = 1.0A, VCE = 5.0V, TA = 25 °C
VCE = 40V
VCC = 5V to 40V, CT = 0.001µF,
Pin7=VCC , V5 >VTH pin2=Gnd,
Remaining pins open
-
nA
Note3: Tlow = 0 °C for B34063A, - 40 °C for B34063AI, AE, Thigh = +70°C for the B34063A, Thigh = +85°C for the B34063AI, +125°C for the
B34063AE
Note4: Low Duty cycle pulse techniques are used during test to maintain junction temp. as close to ambient temp. as possible.
Note5: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch current (≤300mA) and high driver currents
(≥30mA). It may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz. And is
magnified at high temperatures. This condition does not occur with a Darlington configuration. Since the output switch can not saturate. If a nonDarlington configuration is used the following output drive condition is recommended:
Forces β of output switch : Ic output/Ic driver – 7.0mA ≥10
The 100Ω resistor is the emitter of the driver device requires about 7.0 mA before the output switch conducts
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
Figure 8. Step-Up Converter
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Output Ripple With Optional Filter
Bay Linear, Inc
Conditions
VIN = 8.0 V to 16 V, IO = 175 mA
VIN = 12 V, IO = 75 mA to 175 mA
VIN = 12 V, IO = 175 mA
VIN = 12 V, IO = 175 mA
VIN = 12 V, IO = 175 mA
Results
30 mV = + 0.05%
10 mV = + 0.01%
400 mVp-p
89.2%
40 mVp-p
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
Note 7: If the output switch is driven into hard saturation (non– Darlington configuration) at low switch currents (3 300 mA) and high driver
currents (. 30 mA), it may take up to 2.0 ms to come out of saturation. This condition will shorten the off time at frequencies . 30 kHz, and is
magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non–
Darlington configuration is used, the following output drive condition is recommended.
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
Figure 10. Step-Down Converter
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple With Optional Filter
Bay Linear, Inc
Conditions
VIN = 15 V to 25 V, IO = 500 mA
VIN = 25 V, IO = 50 mA to 500 mA
VIN = 25 V, IO = 500 mA
VIN = 25 V, RL = 0.1Ω
VIN = 25 V, IO = 500 mA
VIN = 25 V, IO = 500 mA
Results
12 mV = + 0.12%
3.0 mV = + 0.03%
120 mVp-p
1.1A
83.7%
40 mVp-p
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
Figure 12. Voltage Inverting Converter
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple With Optional Filter
Bay Linear, Inc
Conditions
VIN = 4.5 V to 6.0 V, IO = 100 mA
VIN = 5.0 V, IO = 10 mA to 100 mA
VIN = 5.0 V, IO = 100 mA
VIN = 5.0 V, RL = 0.1 Ω
VIN = 5.0 V, IO = 100 mA
VIN = 5.0 V, IO = 100 mA
Results
3 mV = + 0.12%
0.022 mV = + 0.09%
500 mVp-p
910mA
62.2%
70 mVp-p
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
4.0 (0.158)
3.8 (0.150)
5.2 (0.205)
4.6 (0.181)
6.2 (0.244)
5.8 (0.228)
Pin 1
1.27 (0.50)
BSC
1.75 (0.069)
1.35 (0.053)
0.78 (0.031)
0.61 (0.024)
5.0 (0.197)
4.8 (0.188)
0.37 (0.015)
BSC
45°
0.77 (0.030)
0.64 (0.025)
7 °(4 PLCS)
3° -6°
0.56 (0.022)
0.49 (0.019)
0.45 (0.018)
0.35 (0.014)
Bay Linear, Inc
0.20 (0.008)
0.10 (0.004)
0.22 (0.009)
0.19 (0.007)
7 °(4 PLCS)
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B34063A
Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,
computer simulations and/ or initial prototype evaluation.
Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are
subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.
The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit
design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any
industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different
applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.
LIFE SUPPORT AND NUCLEAR POLICY
Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical
implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without
the specific written consent of Bay Linear President.
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
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