SSC SS6563-CNTB

SS6563
Versatile DC/DC Converter
FEATURES
DESCRIPTION
The SS6563 is a monolithic control circuit that
Operates from 3V to 30V input voltage
Internal 2A peak current switch.
Continuous output current of 1.5A
Bootstrapped driver.
High-side current sense capability.
High efficiency (up to 90%).
provides the primary functions required for DC to
DC converters and high-side-sensed constant
current sources. The device consists of an internal temperature compensated reference, comparator, controlled duty-cycle oscillator with an
Internal ±2% reference.
Low quiescent current at 1.6mA.
Operating frequency from 100Hz to 100KHz.
active current-sense circuit, bootstrapped driver,
and high-current output switch. This device is
specifically designed to construct a constant current source for battery chargers with a minimum
APPLICATIONS
number of external components. A bootstrapped
Constant Current Source for Battery Chargers.
Saver for Cellular phones.
Step-Down DC/DC Converter Module.
driver can drive the NPN output switch to saturation for higher efficiency and less heat dissipation.
The SS6563 can deliver 1.5A continuous current
without requiring a heat sink.
TYPICAL APPLICATION CIRCUIT
D3
R1
When VIN>15V
make R1=1K
470
D2
+
1N4148
RS
0.22
8V~25V
300µH
BOOST
DC
IS
DE
VCC
CF
7
6
+
C1
100µF
L1
1µF
8
VIN
1N4148
C3
5
GND
FB
D1
1N5819
1
2
3
4
+
5V/1A
C4
470µF
R2
390K
C2
1000pF
SS6563
RB
RA
1K
3K
R3
2.2M
Line Regulation
VIN = 10V~20V @ IO=1A
40mV
Load Regulation
VIN = 15V, @ IO=100mA~1A
20mV
Short Circuit Current
VIN =15V, @ RL = 0.1Ω
1.3A
Step-Down Converter
Rev.2.02 4/06/2004
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SS6563
ORDERING INFORMATION
PIN CONFIGURATION
SS6563-CXXX
PDIP-8, SO-8
Packing
TR: Tape and reel
TB: Tubes
TOP VIEW
DC
Package type
DE
N: PDIP-8 (only available in tubes) CF
S: SO-8
GND
Example: SS6563CSTR
1
8
BOOST
2
7
3
6
IS
VCC
4
5
FB
à in SO-8 package shipped in tape and reel
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ..............................................................……………............................. 30V
Comparator Input Voltage Range ............................................………….......... -0.3V~30V
Switch Collector Voltage ....................................................……………......................... 30V
Switch Emitter Voltage ......................................................……………......................... 30V
Switch Collector to Emitter Voltage ..................................…………............................. 30V
Driver Collector Voltage ....................................................…………….......................... 30V
Switch Current ................................................………………......................................... 2A
Power Dissipation and Thermal Characteristics
DIP Package
Ta= 25°C ............................…………................................ 1.0W
Thermal Resistance .............…………......................... 100°C/W
SO Package
Ta= 25°C......................……………............................... 625mW
Thermal Resistance ...................………...................... 160°C/W
Operating Junction Temperature .....................................................………............. 125°C
Operating Ambient Temperature Range .......................……………......................... 0~70°C
Storage Temperature Range ...................................………….................... - 65°C ~ 150°C
Rev.2.02 4/06/2004
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SS6563
TEST CIRCUIT
R1
VCC
1K
50mA
Current Source
4.55V
@VCC=5V
1A
Current Source
1
BOOST 8
DC
2
3
2V/0V
IDISCHG/ ICHG
DE
IS
CF
VCC
4
FB
GND
4.75V
7
6
VCC
5
1.275V
1.225V
SS6563
CT
1nF
ELECTRICAL CHARACTERISTICS
PARAMETER
(VCC= 5V, T A=25°C, unless otherwise specified.)
TEST CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Oscillator
Charging Current
5.0V≤VCC≤30V
ICHG
10
25
40
µA
Discharge Current
5.0V≤VCC≤30V
IDISCHG
100
150
200
µA
Voltage Swing
PIN 3
Discharge to Charge Current Ratio
VIS =VCC
Current Limit Sense Voltage ICHG=IDISCHG
VOSC
0.6
IDISCHG / ICHG
6.0
VCC – VIS
250
V
300
350
mV
Output Switch
Saturation Voltage, Emitter
Follower Connection
IDE=1.0A;
VBOOST =VDC = VCC
VCE(SAT)
1.5
1.8
V
Saturation Voltage
IDC=1.0A; IBOOST
=50mA, (Forced β≅20)
VCE (SAT)
0.4
0.7
V
DC Current Gain
ISC =1.0A; VCE=5.0V
Collector Off-State Current
VCE=30V
Rev.2.02 4/06/2004
hFE
IC(OFF)
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35
120
10
nA
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SS6563
ELECTRICAL CHARACTERISTICS
PARAMETER
(VCC= 5V, TA=25°C, unless otherwise specified.)
TEST CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
1.275
V
1.29
V
Comparator
Threshold Voltage
TA=25°C
0°C ≤ TA ≤ 70°C
Threshold Voltage Line
Regulation
3.0V≤VCC≤30V
Input Bias Current
Supply Current
1.225
VFB
1.21
1.25
REGLINE
0.1
0.3
mV/V
VIN=0V
IIB
0.4
1
µA
VIS =VCC, pin 5>VFB
5.0V≤ VCC ≤30V
CT=1nF
PIN 2=GND
Remaining pins open
ICC
1.6
3
mA
ICC, Supply Current (mA)
ON -TIME
100
1000
2
VCC=5V
VIS =VCC
PIN 5=GND
10
OFF-TIME
1.6
CT = 1nF
VIS = VCC
PIN 2 =GND
1.2
0.8
0.4
1
tON-OFF, Output Switch ON-OFF Time (µS)
TYPICAL PERFORMANCE CHARACTERISTICS
1
0.1
10
CT, Oscillator Timing Capacitor (nF)
Fig. 1 Output Switch ON-OFF Time vs. Oscillator
Timing Capacitor
Rev.2.02 4/06/2004
100
0
0
5
10
15
20
25
30
VCC, Supply Voltage (V)
Fig. 2 Standby Supply Current vs. Supply Voltage
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SS6563
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
350
1.3
VFB, Threshold Voltage (V)
VCC-VIS Threshold Voltage ( mV)
VCC = 5V,
CT = 1nF,
PIN 2 = GND
1.28
1.26
1.24
1.22
1.2
0
10
20
30
40
50
60
70
80
VCC = 5V,
CT = 1nF,
PIN 2 = GND
340
330
320
310
300
290
280
270
260
250
0
10
20
Temperature (°C)
Fig. 4
Fig. 3 VFB, Threshold Voltage vs. Temperature
0.8
VCE(SAT), Saturation Voltage (V)
VCE(SAT), Saturation Voltage (V)
1.8
VCC = 5V
PIN 1, 7, 8 = VCC
PIN 3, 5 = GND
1.7
1.6
1.5
1.4
1.3
1.2
0
0.5
1
40
50
60
70
80
VCC = 5V
PIN 7 = VCC
PIN 2, 3, 5 = GND
0.6
0.4
Forced Beta = 20
0.2
0
0
1.5
30
Temperature (°C)
IS Threshold Voltage vs. Temperature
0.5
IE, Emitter Current (A)
1
1.5
IC, Collector Current (A)
Fig. 6 Common Emitter Configuration Output Switch
Saturation Voltage vs. Collector Current
Fig. 5 Emitter Follower Configuration Output Switch
Saturation Voltage vs. Emitter Current
BLOCK DIAGRAM
1
DC
8
Q2
Q1
BOOST
QS
R
80
2
DE
7
IS
Is
CT
Oscillator
CF
6
3
VCC
Comparator
1.25V
Reference
Voltage
GND
Rev.2.02 4/06/2004
+
-
4
5
FB
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SS6563
PIN DESCRIPTIONS
PIN 1: DC
- The collector of the switch - 2A.
PIN 5: FB
- Feedback comparator inverting input.
PIN 2: DE
- Darlington switch emitter.
PIN 6: VCC - Power supply input.
PIN 3: CF
- Oscillator timing capacitor.
PIN 7: IS
- Highside current sense input.
VCC - VIS=300mV.
PIN 4: GND - Power ground.
PIN 8: BOOST - Bootstrapped driver collector.
APPLICATION INFORMATION
DESIGN FORMULA TABLE
CALCULATION
t ON
t OFF
(tON + tOFF) MAX
STEP-DOWN
STEP-UP
VOUT + VF
VIN(MIN) - VSAT - VOUT
1
FMIN
VOUT + VF - VIN(MIN)
VIN(MIN) - VSAT
1
FMIN
-5
CT
4x10 tON
IC (SWITCH)
2IOUT(MAX)
RS
2IOUT(MAX) (
0.3/IC(SWITCH)
L(MIN)
Co
(
The following power supply characteristics must be
chosen:
VIN
- Nominal input voltage.
VOUT
- Desired output voltage,
VOUT = 1.25 (1 + RB/RA)
t ON + t OFF
)
t OFF
0.3/ IC (SWITCH)
VIN(MIN) - VSAT - VOUT
)tON(MAX)
IC(SWITCH)
IC( SWITCH) (t ON + t OFF)
8V RIPPLE( P - P )
VSAT = Saturation voltage of the output switch.
VF
= Forward voltage of the ringback rectifier
IOUT
-5
4 x 10 tON
FMIN
(
VIN(MIN) - VSAT
)tON(MAX)
IC(SWITCH)
IOUT tON
VRIPPLE(P - P)
- Minimum desired switching frequency at
selected values for VIN and IOUT .
VRIPPLE (P-P) - Desired peak-to-peak output ripple voltage.
In practice, the calculated value will need
to be increased due to the capacitor
equivalent series resistance and board layout. The ripple voltage should be kept to a
low value since it will directly affect the line
and load regulation.
- Desired output current.
Rev.2.02 4/06/2004
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SS6563
APPLICATION EXAMPLES
D1
R2
1K
D2
L1
IN4148
C5
C4
220µF
U1
3
4
C1
BOOST
IS
+
GND
FB
470P
C10
C7
0.1µF
47nF
MPS2222A
ICON
VBT
3
LED2
DIS
680
4
LED1
VTS
GND
VCC
6
BAT1
C3
220µF
SS6563
2
R15
Q1
91K
VCC
5
DSW
5
RS 0.3/1W
6
CF
4.7µF
1N5819
IN4148
7
DE
D4
D3
8
DC
RX
R7
THERMISTOR
2
C9
R9
100K
1
PEAK
+
RY
R14
C11
C6
0.1µF
7
200K
+
100µF
C8
R12
U2
YELLOW
0.1µF
**BATTERY
1
R4
PB SW
R10
100K
R8
300K
LED3
LED2
20/5W
IN5819
+
1µF
R5 120/0.5W
390K
270
LED1
220µH
C2
SW1
R3
R1
R6
8
50K
0.1µF
R11
SEL1
ADJ
SEL3
SEL2
TMR
MODE
GREEN
RED
R16
R17
680
680
16
15
14
13
12
11
10
9
SS6781
100K
U3
VIN
11~15V
78L05
VIN
+
R13
470K
C12
VOUT
Q2
MMBT2222A
+
C13
GND
1µF
10µF
**3~5 NiMH/NiCd cells.
Note: Charge Current=0.3/RS Ampere
Safety Timer: 80min
Fig. 1 Battery Charger Circuit for Fluctuating Charging Current Applications
R1
220µH
1K
C3
1µF
R2
120
D2
D3
1N5819
(%)
V IN = 16V, V O= 12V
D1
1N5821
1N4148
220µF
DC
+
+
DE
C1
470pF
CF
CT
CO
GND
SS6563
90
C5
10µF
BOOST
220µF
IO
L
+
VIN
100
*RS
IS
V IN= 16V, V O= 8V
80
VCC
RB
FB
RA
5.6K
33K
70
0
*IO=300mV/RS
0.5
1
1.5
2
Io (A )
Efficiency vs Output Current
Fig. 2 Battery Charge Circuit
Rev.2.02 4/06/2004
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SS6563
APPLICATION EXAMPLES
(Continued)
C3
D1
L1
+
5V
1N5819
300µH
1µF
8
RS
0.22
VIN
BOOST
DC
IS
DE
VCC
CF
7
6
16V~25V +
5
C1
100µF
GND
FB
D1
1N5819
1
+
12V/1A
C4
470µF
2
3
4
RB
C2
470pF
RA
1K
SS6563
13K
Fig. 3 Step-Down Converter with External 5V Bootstrap
D1
200µH
VOUT
L1
1N5819
R1
150
RS
0.22
VIN
8~16V
C1
+
100µF
28V/200mA
+
8 BOOST
DC 1
7 IS
DE 2
6 VCC
CF 3
220µF
C0
GND 4
5 FB
CT
680pF
SS6563
RA
RB
2K2
47K
Line Regulation
VIN = 8V~16V @ IO=200mA
100mV
Load Regulation
VIN = 12V, @ IO=80mA~200mA
40mV
Fig. 4 Step-Up Converter
Rev.2.02 4/06/2004
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SS6563
APPLICATION EXAMPLES
(Continued)
D1
L
VOUT
R1
+
8
BOOST
DC
IS
DE
7
RS
VIN
6
CF
VCC
+
5
C1
FB
GND
C0
1
2
Q1
3
R2
4
CT
SS6563
RA
RB
Fig. 5 Step-Up Converter with External NPN Switch
1
2
L1
BOOST
DE
IS
CF
VCC
3
100µH
D1
DC
7
0.26
RS
6
4
CT
560pF
8
5
GND
FB
VIN
4.5V~6V
+
100µF
C1
1N5819
SS6563
VOUT
-12V/100mA
+
953
RB
C0
RA
8.2K
470µF
Line Regulation
VIN = 4.5V~6V @ IO=100mA
20mV
Load Regulation
VIN = 5V, @ IO=10mA~100mA
100mV
Fig. 6 Inverting Converter
Rev.2.02 4/06/2004
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SS6563
PHYSICAL DIMENSIONS
8 LEAD PLASTIC SO (unit: mm)
D
SYMBOL
MIN
MAX
A
1.35
1.75
A1
0.10
0.25
B
0.33
0.51
C
0.19
0.25
D
4.80
5.00
E
3.80
4.00
H
E
e
e
A
A1
C
B
1.27(TYP)
H
5.80
6.20
L
0.40
1.27
L
8 LEAD PLASTIC DIP (unit: mm)
D
E1
E
A2
A1
MAX
A1
0.381
—
A2
2.92
4.96
b
0.35
0.56
C
0.20
0.36
D
9.01
10.16
E
7.62
8.26
E1
6.09
7.12
e
eB
e
MIN
C
L
b
SYMBOL
2.54 (TYP)
eB
—
10.92
L
2.92
3.81
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responsibility for its use, or for infringement of any patent or other intellectual property rights of third parties that may result from its
use. Silicon Standard reserves the right to make changes as it deems necessary to any products described herein for any reason, including
without limitation enhancement in reliability, functionality or design. No license is granted, whether expressly or by implication, in relation to
the use of any products described herein or to the use of any information provided herein, under any patent or other intellectual property rights of
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