ONSEMI NCP5604A

NCP5604A, NCP5604B
High Efficiency White LED
Driver
The NCP5604A and NCP5604B products are multiple output LED
drivers dedicated to the display back light. The NCP5604A drives up
to 4 LEDs, the NCP5604B version being dedicated to the three LED
applications.
The two parts share a common built−in DC/DC converter, based on
a charge pump structure, including the new 1.33X mode of operation,
improving the efficiency over the full input battery supply voltage
span over 90%.
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MARKING
DIAGRAM
16
1
WQFN16 (3x3)
MT SUFFIX
CASE 488AK
Features
2.7 to 5.5 V Input Voltage Range
Consistent 85% Efficiency
1.0 mA Quiescent Supply Current
All Pins are Fully ESD Protected
Built−in Short Circuit Protection
Provides Four Independent LED Drives
200 kHz Digital Dimming Function
Unloaded LED Protection
Short Circuit Current Proof
Tight 0.5% LED Current Matching
These are Pb−Free Devices
1
NCPx
5604
ALYWG
G
NCPx5604 = Specific Device Code
x = A or B
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
• Portable Back Light
• Digital Cellular Phone Camera Photo Flash
• LCD and Key Board Simultaneously Drive
16
15
14 13
C2P
C2N
Typical Applications
C3P
PIN CONNECTIONS
C3N
•
•
•
•
•
•
•
•
•
•
•
ÇÇ
ÇÇ
Vbat 1
12 VOUT
EN 2
11 C1P
IREF 3
10 C1N
9 PGND
6
7
8
LED2
LED1
LED4/NC*
5
LED3
AGND 4
* Pin 5 in not connected in the NCP5604B
(Top View)
ORDERING INFORMATION
Device
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
March, 2006 − Rev. 0
1
Package
Shipping†
NCP5604AMTR2G
WQFN16 3000/Tape & Reel
(Pb−Free)
NCP5604BMTR2G
WQFN16 3000/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
Publication Order Number:
NCP5604/D
NCP5604A, NCP5604B
220 nF/10 V
Vbat
C3
15
C2P
C1N
IREF
11
U1
NCP5604A
100 k
GND
C1P
10
C5
LED1
12
8
LED2
7
LED3
6
LED4
VOUT
5
4
AGND
9
PGND
13
1 mF/10 V
3
EN
14
220 nF/10 V
R1
C2N
220 nF/10 V
2
CONTROL
VBAT
C2
1
C1
4.7 mF/6.3 V
C3N
GND
C3P
16
C4
LWY87S
D4
D3
LWY87S
D2
LWY87S
D1
LWY87S
Figure 1. Typical Multiple White LED Driver
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2
GND
NCP5604A, NCP5604B
16
C3
C2
C1
220 nF
220 nF
220 nF
15
14
13
11
10
C5
GND
1 mF/10 V
Vbat
OVERVOLTAGE
Q1
8
Q2
CURRENT CONTROL
R1
GND
3
100 k
AGND
ANALOG CONTROL
4
Q3
Q4
OVERTEMPERATURE
7
6
5
9
Figure 2. NCP5604A Simplified Block Diagram
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3
PGND
D4
Vbat
DIGITAL CONTROL
D3
2
D1
EN
LWY87S
Vout
LWY87S
12
LWY87S
4.7 mF/10 V
CHARGE PUMP
DC−DC CONVERTER
D2
1
LWY87S
C4
GND
NCP5604A, NCP5604B
16
C3
C2
C1
220 nF
220 nF
220 nF
15
14
13
11
10
C5
GND
1 mF/10 V
Vbat
Vout
OVERVOLTAGE
Vbat
DIGITAL CONTROL
Q1
8
Q2
CURRENT CONTROL
R1
GND
3
100 k
AGND
ANALOG CONTROL
4
Q3
7
6
NC 5
OVERTEMPERATURE
9
PGND
Figure 3. NCP5604B Simplified Block Diagram (Pin 5 disconnected)
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4
D3
2
D1
EN
LWY87S
12
LWY87S
4.7 mF/10 V
CHARGE PUMP
DC−DC CONVERTER
D2
1
LWY87S
C4
GND
NCP5604A, NCP5604B
PIN FUNCTION DESCRIPTION
Pin
Symbol
Type
Description
1
VBAT
INPUT, POWER
Input Battery voltage to supply the analog and digital blocks. The pin must be decoupled to
ground by a 1.0 mF ceramic capacitor.
2
EN
INPUT, DIGITAL
This pin carries the Enable function to control the DC−DC converter. It can be used to
digitally dim the LED by using a PWM technique.
EN = Low ³ shutdown mode, the DC−DC is disconnected from the load.
EN = High ³ operating mode, the DC−DC is activated.
The digital PWM dimming can operate over the 100 Hz − 200 kHz frequency, depending
upon the application requirements.
3
IREF
INPUT, ANALOG
This pin provides the reference current, based on the internal bandgap voltage reference,
to control the output current flowing in the LED. A 1% tolerance, or better, resistor shall be
used to get the highest accuracy of the LED biases. An external current source can be
used to bias this pin to dim the light coming out of the LED.
In no case shall the voltage at pin 3 be forced either higher or lower than the 600 mV
provided by the internal reference.
4
AGND
POWER
This pin is the GROUND signal for the analog and digital blocks and must be connected to
the system ground.
5
LED4
INPUT, POWER
NCP5604A: This pin sinks to ground and monitors the current flowing into the fourth LED,
intended to be used in backlight application. The current is limited to 25 mA maximum
(Note 2).
NCP5604B: This pin is not connected.
6
LED3
INPUT, POWER
This pin sinks to ground and monitors the current flowing into the third LED, intended to be
used in backlight application. The current is limited to 25 mA maximum (Note 2).
7
LED2
INPUT, POWER
This pin sinks to ground and monitors the current flowing into the second LED, intended to
be used in backlight application. The current is limited to 25mA maximum (Note 2).
8
LED1
INPUT, POWER
This pin sinks to ground and monitors the current flowing into the first LED, intended to be
used in backlight application. The current is limited to 25 mA maximum (Note 2).
9
PGND
POWER
This pin is the GROUND reference for the DC−DC converter and the output current
control. The pin must be connected to the system ground, a ground plane being strongly
recommended.
10
C1P
POWER
One side of the external charge pump capacitor (CFLY) is connected to this pin, associated
with C1N, pin 11 (Note 1).
11
C1N
POWER
One side of the external charge pump capacitor (CFLY) is connected to this pin, associated
with C1P, pin 10 (Note 1).
12
VOUT
OUTPUT, POWER
This pin provides the output voltage supplied by the DC−DC converter. The Vout pin must
be bypassed by 1.0 mF ceramic capacitor located as close as possible to the pin to
properly bypass the output voltage to ground. The circuit shall not operate without such
bypass capacitor properly connected to the Vout pin.
The output voltage is internally clamped to 5.5 V in the event of no load situation. On the
other hand, the output current is limited to 100 mA in the event of a short circuit to ground.
13
C2P
POWER
One side of the external charge pump capacitor (CFLY) is connected to this pin, associated
with C2N, pin 14 (Note 1).
14
C2N
POWER
One side of the external charge pump capacitor (CFLY) is connected to this pin, associated
with C2P, pin 13 (Note 1).
15
C3P
POWER
One side of the external charge pump capacitor (CFLY) is connected to this pin, associated
with C3N, pin 16 (Note 1).
16
C3N
POWER
One side of the external charge pump capacitor (CFLY) is connected to this pin, associated
with C3P, pin 15 (Note 1).
1. Using low ESR 1.0 mF ceramic capacitor is mandatory to optimize the Charge Pump efficiency. The DC Bias effect must be taken into account
when selecting the ceramic capacitor. Smallest foot print packages (size 0602 and lower) are prone to strong DC bias effect, reducing the real
capacitance significantly.
2. Total DC−DC output current is limited to 100 mA.
3. The exposed flag shall be connected to ground.
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5
NCP5604A, NCP5604B
MAXIMUM RATINGS
Symbol
Value
Unit
Power Supply
Rating
VBAT
7.0
V
Output Power Supply
Vout
7.0
V
Digital Input Voltage
Digital Input Current
EN
−0.3 < V < VBAT
1.0
V
mA
ESD
2
200
kV
V
PD
RqJA
320
125
mW
°C/W
Operating Ambient Temperature Range
TA
−40 to +85
°C
Operating Junction Temperature Range
TJ
−40 to +125
°C
Human Body Model: R = 1500 W, C = 100 pF (Note 4)
Machine Model
QFN16 Package
Power Dissipation @ TA = +85°C (Note 5)
Thermal Resistance, Junction−to−Air
TJmax
+150
°C
Storage Temperature Range
Tstg
−65 to +150
°C
Moisture Sensitivity Level (Note 7)
MSL
1
Maximum Junction Temperature
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
4. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM): JESD22−A114.
Machine Model (MM): JESD22−A115.
5. The maximum package power dissipation limit must not be exceeded.
6. Latchup current maximum rating: " 100 mA per JEDEC standard: JESD78.
7. Moisture Sensitivity Level (MSL): per IPC/JEDEC standard: J−STD−020A.
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6
NCP5604A, NCP5604B
POWER SUPPLY SECTION (Typical values are referenced to TA = +25°C, Min & Max values are referenced −40°C to +85°C ambient
temperature, operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.)
Pin
Symbol
1
Vbat
12
Min
Typ
Max
Unit
Power Supply
2.7
−
5.5
V
Iout
Continuous DC Current in the Load (Note 8)
@ Vf = 3.2 V, 3.3 V < Vbat < 5.5 V (Total Iout = 4*LED)
100
−
−
mA
12
Isch
Continuous Output Short Circuit Current
−
40
150
mA
12
Vout
Output Voltage Compliance (OVP)
4.8
−
6.0
V
12
Tstart
DC−DC Start Time (Cout = 1.0 mF)
− from Vout = 0 V to full load operation, @ Vbat = nominal
−
100
−
ms
Standby Current, @ Iout = 0 mA, EN = GND
Vbat = 3.6 V
Vbat = 4.2 V
−
−
0.3
0.4
3.0
5.0
Operating Current, @Iout = 0 mA, EN = H
2.85 V < Vbat < 5.5 V
Vbat = 3.6 V
−
−
1.0
−
−
1.5
Output LED to LED Current Matching, @ Vbat = 3.6 V,
ILED = 20 mA, LED1 to LED4 are identical (Note 9)
−2.0
"0.2
+2.0
Output Current Tolerance (Note 9)
@ 3.2 V < Vbat < 4.2 V, ILED = 20 mA
−5.0
"1.0
+5.0
0.85
1.0
1.15
MHz
1
1
5, 6, 7, 8
5, 6, 7, 8
Istdb
Iop
IMAT
ITOL
Rating
mA
mA
%
%
−
Fpwr
Charge Pump Operating Frequency
−25°C < TA < 85°C
−
TSD
Thermal Shutdown Protection
−
160
−
°C
−
TSDH
Thermal Shutdown Protection Hysteresis
−
30
−
°C
−
EPWR
Efficiency (Note 9)
LED1 to LED4 = 5.0 mA, Vf = 2.95 V (Total = 20 mA), Vbat = 3.2 V
LED1 to LED4 = 25 mA, Vf = 3.3 V (Total = 100 mA), Vbat = 3.8 V
−
−
87
85
−
−
%
8. The total output current is evenly distributed across the external LED.
9. LED4 is not connected in the NCP5604B version.
10. The NCP5604B controls 75 mA in total in the three current mirrors, the extra 25 mA available current from the DC−DC converter being available
for external purpose.
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7
NCP5604A, NCP5604B
ANALOG SECTION (Typical values are referenced to TA = +25°C, Min & Max values are referenced −40°C to +85°C ambient
temperature, operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.)
Pin
Symbol
3
IREF
3
−
Rating
Min
Typ
Max
Unit
Reference Current @ Vref = 600 mV (Note 11)
1.0
−
100
mA
VREF
Reference Voltage (Note 12)
−2%
600
+2%
mV
ILEDR
Reference Current (IREF) to Output LED Current Ratio
−
260
−
−
11. The overall output current tolerance depends upon the accuracy of the external resistor. Using 1% or better resistor is recommended.
12. The external circuit must not force the IREF pin voltage either higher or lower than the 600 mV specified.
DIGITAL PARAMETERS SECTION (Typical values are referenced to TA = +25°C, Min & Max values are referenced −40°C to +85°C
ambient temperature, operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.) Note: Digital inputs undershoot < − 0.30 V to
ground, Digital inputs overshoot < 0.30 V to VBAT.
Pin
Symbol
2
FPWM
2
2
Rating
Min
Typ
Max
Unit
Input Enable PWM
0.1
−
200
kHz
VIH
Positive Going Input High Voltage Threshold, EN Signal
1.3
−
VBAT
V
VIL
Negative Going Input High Voltage Threshold, EN Signal
0
−
0.4
V
APPLICATIONS INFORMATION
DC−DC OPERATION
The converter is based on a charge pump technique to
generate a DC voltage capable to supply the White LED
load The system regulates the current flowing into each
LED by means of internal current mirrors associated with
the white diodes. Consequently, the output voltage will be
equal to the Vf of the LED, plus the 300 mV (typical)
developed across the internal NMOS mirror. Typically,
assuming a standard white LED forward biased at 10 mA,
the output voltage will be 3.8 V.
The third external capacitor makes possible the 1.33X
extra mode of operation, with a significant efficiency
improvement of the converter over the normal battery
voltage span. The threshold levels have been defined to
optimize this range of operating voltage, assuming a high
efficiency is not relevant when the system is connected to
a battery charger ( i.e. Vbat > 4.5 V).
The built−in OVP circuit continuously monitor each
output and stops the converter when the voltage is above
5.0 V. The converter resumes to normal operation when the
voltage drops below 5.0 V (no latch−up mechanism).
Consequently, the chip can operate with no load during any
test procedures, but in the case of special applications, it is
recommended to connect the non used LED driver either to
a LED, or to the Vbat supply to minimize the internal losses
(see LOAD CONNECTION paragraph).
voltage is based on a temperature compensated Band Gap
structure, a tight tolerance resistor will provide a very
accurate load current. The resistor is calculated from the
Ohm’s law (Rbias = Vref/I REF) and a more practical
equation can be arranged to define the resistor value for a
given output current:
Rbias + (Vref * k)ńIout
Rbias + (0.6 * 260)ńIout
(eq. 1)
Rbias + 156ńIout
(eq. 2)
Consequently, the resistor value will range between
Rbias = 156/25 mA = 6240 W and Rbias = 156/0.5 mA =
312 kW. Obviously, the tolerance of such a resistor must be
1% or better, with a 100 ppm thermal coefficient, to get the
expected overall tolerance.
VBandGap
LED Return
+
−
LOAD CURRENT CALCULATION
The load current is derived from the 600 mV reference
voltage provided by the internal Band Gap associated to the
external resistor connected across IREF pin and Ground (see
Figure 4). In any case, no voltage shall be forced at IREF
pin, either downward or upward.
The reference current is multiplied by the constant
k = 260 to yield the output load current. Since the reference
Pin 5 to 8
600mV
IREF
Pin 3
GND
GND
Note: The IREF pin must never be biased
to voltage higher than 600 mV.
Figure 4. Basic Reference Current Source
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8
NCP5604A, NCP5604B
LOAD CONNECTION
The NCP5604A chip is capable of driving the four LED
simultaneously, as depicted in Figure 1, but the load can be
arranged to accommodate one or two LED if necessary in
the application (see Figure 8). The four current mirror can
be connected in parallel to drive a single powerful LED,
thus yielding 100 mA current capability in a single LED.
Iout drift versus Vbat
5
Iout = 28mA
Iout = 80mA
4
Iout drift (%)
3
2
1
0
−1
12
−2
3.5
4.0
Vbat(V)
4.5
5.0
5.5
Figure 5. Typical IOUT Tolerance as a Function of the
VBAT Supply
Iref = 5 mA
C5
8
GND
7
3
1 mF/6.3 V
3.0
NCP5604
−5
2.5
D1
−4
LWY87S
−3
6
255C
0
2.5
3.0
3.5
4.0
Vbat (V)
4.5
5.0
5.5
1 mF/6.3 V
LWY87S
C5
GND
6
5
Iref = 100 mA
3
Iout Current Matching (%)
8
7
Figure 6. Typical LED to LED Current Matching at
Low IREF
Figure 8. Typical Single and Double LED
Connections
−405C
255C
2
The applications using three LED shall use the
NCP5604B version to make profit of the highest efficiency
(see Figure 9). In this case, LED4 is not connected and pin
5 is internally unconnected.
855C
1
0
2.5
D1
1
D2
12
855C
LWY87S
2
NCP5604
Iout Current Matching (%)
5
−405C
3.0
3.5
4.0
Vbat (V)
4.5
5.0
5.5
Figure 7. Typical LED to LED Current Matching at IREF
Maximum
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9
NCP5604A, NCP5604B
VOUT
12
D1
C5
D2
D3
GND
LWY87S
GND
GND
PGND
C1N
The PWM frequency can be up to 200 kHz once the
circuit has been properly started. On the other hand, with
a 1% to 99% span, the circuit supports a large Duty Cycle
to accommodate any range of dimming. The waveforms
given in Figure 12 illustrate the NCP5604A behavior
during the 50 kHz PWM operation. The same mechanism
applies for the NCP5604B version.
C5
5 mA
LWY87S
D6
220R
R2
LWY87S
D4
5 mA
LWY87S
LWY87S
D3
D5
LWY87S
D2
R1
LWY87S
1 mF/6.3 V
D1
8
7
220R
NCP5604
AGND
Figure 11. Basic Digital PWM Dimming Control
Finally, an external network can be connected across
Vout and ground, but the current through such network will
not be regulated by the NCP5604A chip (see Figure 10).
On top of that, the total current out of the Vout pin shall be
limited to 100 mA.
12
VOUT
4
9
Figure 9. Using the NCP5604B to Drive a Three LED
Layout
GND
C1P
C3N
LWY87S
LWY87S
C3P
IREF
LED1
10
C2N
LED2
C3P
C1N
C1
220 nF/10 V
C2P
EN
LED3
5
3
11
VBAT
6.8 k
PGND
NC
9
2
PWM
R1
4
C2
220 nF/10 V
1uF/10V
100k
U1
C2P
IREF NCP5604B
C1P
AGND
13
LED1
3
14
8
EN
15
16
2
R1
C2N
C3N
VBAT
LED2
1
LED3
GND
C3
7
CONTROL
1
6
C4
GND
4.7uF/6.3V
Input PWM Signal Frequency:
100 Hz to 200 kHz
220 nF/10 V
LED4
Vbat
6
5
GND
Figure 10. Extra Load Connected to Vout
Figure 12. PWM Modulation Span: 1% to 99%
DIMMING
The dimming can be achieved by two means:
• Use a digital PWM signal to control the EN pin
• Use an analog signal to control the reference current
IREF pin.
The digital PWM is straightforward, yielding a zero to
100% duty cycle, but the output current is pulsed since the
system is continuously switched ON/OFF. There is no need
for extra passive component, the clock being provided by
an I/O port from the MCU (see Figure 11).
Besides the popular PWM mode, a simple analog
technique can be built with two extra components (one
resistor + one NMOS), the net advantage being a
continuous output current once the operating point has
been stabilized (see Figure 13). The absolute output
current tolerance depends upon the precision of the two
external resistors, the RDS(on) of the NMOS being
negligible in front of the resistor value. The example given,
Figure 13 yields a 1.0 mA output current when Q1 is OFF,
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10
VBAT
2
ENABLE
C3P
150 k
R1
6.8 k
R2
C2N
IREF
C3N
VOUT
4
VBAT
C1N
C1P
C2P
C2N
EN
C3P
IREF
V = 3.3 V
C3N
VOUT
GND
GND
Figure 14. Basic Analog PWM Dimming Control
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11
LED1
LED2
8
GND
7
PGND
LED3
AGND
LED4
9
Q1B
Q1A
10 nF
C1
BC846BDW
6
4
5
15 k
LED1
LED2
8
Figure 13. Basic Analog Dimming Control
3
12 k
LED3
GND
2
PWM
7
5
High Out
6
PGND
Q1
LED4
AGND
9
ENABLE
R2
C2P
EN
3
1
R1
C1N
1
and 23 mA when Q1 is ON. The concept can use either a
DC drive or a pulsed mode to dynamically dim the light out
of the LED.
A different analog approach, but more complex solution,
can be derived from either a DC or a pulsed voltage
associated with a current mirror built with low cost discrete
devices (see Figure 14). The associated filter (R2/R3/C1)
provides a continuous voltage to the current mirror, thus a
digitally controlled continuous output current. Generally
speaking, the PWM frequency could be either in the low
end 20 Hz to 200 Hz band, or above the audio band (25 kHz
and beyond) to make sure the dimming can be adjusted
from zero to 100% without any audible noise. As a matter
of fact, the NCP5604A has been designed to guarantee
200 kHz PWM at the ENABLE pin.
The current mirror can be largely improved by using an
external operational amplifier to get a very stable and
temperature independent current, but such a solution could
turn out to be too expensive and, generally speaking, the
basic structure given, Figure 13, gives good results since
the current depends mostly upon the quality of resistor R2.
C1P
NCP5604A, NCP5604B
NCP5604A, NCP5604B
Figure 15. Startup Operation
Figure 17. Input Current Short Circuit Operation
SHORT CIRCUIT OPERATION
The circuit is designed to support a short circuit across
Vout and Ground without damage. When a short occurs, the
pulsed output current increases to the maximum peak value
until the output voltage drops below 1 V. At this point, the
pulsed current is limited to 40 mA average (typical), until
the short is removed. The waveforms given in Figure 16
illustrate the functional operation. Similarly, the input
current is limited 300 mA peak (typical) as depicted in
Figure 17.
Iout=100 mA
Iout=80 mA
Iout=60 mA
Iout=40 mA Iout=20 mA
90
85
EFFPLED (%)
80
75
70
65
60
55
50
4.2
4.0
3.8
3.6
Vbat(V)
Figure 18. Typical Efficiency
Figure 16. Output Short Circuit Operation
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3.4
3.2
NCP5604A, NCP5604B
TP2
GND
GND
R1
GND
330 k
BSS138
R2
100 nF
GND
TP1
VREF
GND
VCC
GND
S2
ENABLE
VCC
LWY87S
D3
PGND
5
9
4
IREF
EN
3
2
1
AGND
LED4
C8
C3N
6
D1
LED3
8
7
D2
LED2
U1
NCP5604
D4
12
10
C1P
C1N
VOUT
LED1
C3P
VBAT
16
11
13
C2P
C2N
15
6.8 k
Q1
Q
C
12
A
11 B
13 CLR
15
14
RC
Q
U3B
MC14538B
CLR
3
A
B
4
5
9
10
7
Q
Q
2
C
GND
4.7 mF/6.3 V
1
C5
RC
U3A
MC14538B
6
GND
GND
C9
R6
VCC
S1
1
U2A
R3
VCC
100 k
Figure 19. Demo Board Schematic Diagram
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13
PWM
6
100 k
VCC
NL27WZ14
R4
CNT/PWM
3
U2B
1.5 k
R7
VCC
GND
D5
Adjust PWM
4
22 nF
P1
100 kA
NL27WZ14
R5
−
10 k
C6
10 k
100 nF
4
+
GND
GND
2.2 mF/6.3 V
2*1.5 V
PK1
+
+
C7
GND
2
1
S1
POWER
3
C3
220 nF/10 V
14
GND
4.7 mF/10 V
LWY87S
C1
VOUT
Z3
GND
GROUND
C2
C4
LWY87S
220 nF/10 V
LWY87S
220 nF/10 V
NCP5604A, NCP5604B
Figure 20. Silk View Top Layer
Figure 21. Demo Board Printed Circuit Layout
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14
NCP5604A, NCP5604B
PACKAGE DIMENSIONS
WQFN16
MT SUFFIX
CASE 488AK−01
ISSUE O
D
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
5. Lmax CONDITION CAN NOT VIOLATE 0.2 MM
SPACING BETWEEN LEAD TIP AND FLAG.
A
B
ÇÇÇ
ÇÇÇ
PIN 1
LOCATION
E
DIM
A
A1
A3
b
D
D2
E
E2
e
K
L
0.15 C
TOP VIEW
0.15 C
(A3)
0.10 C
A
16 X
0.08 C
SIDE VIEW
MILLIMETERS
MIN
MAX
0.70
0.80
0.00
0.05
0.20 REF
0.18
0.30
3.00 BSC
1.65
1.85
3.00 BSC
1.65
1.85
0.50 BSC
0.20
−−−
0.30
0.50
SEATING
PLANE
A1
C
D2
16X
e
L
5
NOTE 5
EXPOSED PAD
8
4
9
E2
16X
K
12
1
16
16X
0.10 C A B
0.05 C
13
b
BOTTOM VIEW
NOTE 3
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NCP5604/D