Diodes AL8806Q User Manual

A

Description

The AL8806Q is a step-down DC/DC converter designed to drive LEDs

with a constant current. The device can drive up to 8 LEDs, depending

on the forward voltage of the LEDs, in series from a voltage source of

6V to 30V. The AL8806Q switches at frequencies up to 1MHz. This

allows the use of small size external components, hence minimizing

the PCB area needed.

Maximum output current of AL8806Q is set via an external resistor

connected between the V

by applying either a DC voltage or a PWM signal at the CTRL input

pin. An input voltage of 0.4V or lower at CTRL switches off the output

MOSFET simplifying PWM dimming.

The AL8806Q has been qualified to AEC-Q100 Grade 1 and is

Automotive Grade supporting PPAPs

and SET input pins. Dimming is achieved

IN

Features

AUTOMOTIVE GRADE BUCK LED DRIVER

Pin Assignments

Applications

L8806Q

HIGH EFFICIENCY 30V 1.6A

• LED driving current up to 1.5A

• Better than 5% accuracy

• High efficiency up to 98%

• Optimally controlled switching speeds

• Operating input voltage from 6V to 30V

• PWM/DC input for dimming control

• Built-in output open-circuit protection

• Automotive Grade with AEC-Q100 Qualification

• MSOP-8EP: Available in “Green” Molding Compound (No Br, Sb)

 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

• Automotive Grade

 Qualified to AEC-Q100 Standards for High Reliability

 PPAP Capable (Note 4)

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the same,

Typical Applications Circuit

and Lead-free.

<1000ppm antimony compounds.

except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.

• Automotive LED Lamps

• Multi-Die LED Driver

AL8806Q

Document number: DS36905 Rev. 1 - 2

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Pin Descriptions

Pin Name Pin Number Functions

SET 1 Set Nominal Output Current Pin. Configure the output current of the device.

GND 2, 3 GND Pin

CTRL 4

SW 5, 6 Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI.
N/C 7 No Connection

VIN

EP EP

Functional Block Diagram

Dimming and On/Off Control Input.

• Leave floating for normal operation.

= V

(V

CTRL

• Drive to voltage below 0.4V to turn off output current

• Drive with DC voltage (0.5V < V

• A PWM signal (low level ≤ 0.4V and high level > 2.6; transition times less than 1us) allows the output

current to be adjusted below the level set by the resistor connected to SET input pin.

8

Input Supply Pin. Must be locally decoupled to GND with >
section for more information.

Exposed pad:
Connect to GND and thermal mass for enhanced thermal impedance. It should not be used as electrical

ground conduction path.

= 2.5V giving nominal average output current I

REF

< 2.5V) to adjust output current from 20% to 100% of I

CTRL

2.2µF X7R ceramic capacitor – see applications

OUTnom

= 0.1/RS)

L8806Q

OUTnom

Absolute Maximum Ratings

Symbol Parameter Ratings Unit

ESD HBM Human Body Model ESD Protection 2.5 kV

ESD MM Machine Model ESD Protection 200 V

ESD CDM Charged Device Model ESD Protection — V

VIN

VSW

V

CTRL

I

SW-RMS

I

SW-PK

TJ

T

LEAD

TST

Caution: Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;

AL8806Q

Document number: DS36905 Rev. 1 - 2

Continuous V

Transient VIN pin voltage relative to GND

SW voltage relative to GND -0.3 to +36 V

CTRL pin input voltage -0.3 to +6 V

DC or RMS Switch current 1.65 A

Peak Switch current (<10%) 3 A

Junction Temperature 150 °C

Lead Temperature Soldering 300 °C

Storage Temperature Range -65 to +150 °C

functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling
and transporting these devices.

pin voltage relative to GND

IN

(@TA = +25°C, unless otherwise specified.)

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-0.3 to +36

-0.3 to +40

V

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L8806Q

Recommended Operating Conditions (@T

Symbol Parameter Min Max Unit

VIN

V

CTRLH

V

CTRLDC

V

CTRLL

fSW

ISW

TJ

Electrical Characteristics (@ V

Symbol Parameter Conditions Min Typ. Max Unit

V

INSU

V

INSH

IQ

IS

VTH

V

TH-H

I

SET

R

CTRL

V

REF

R

DS(on)

I

SW_Leakage

θJA

θJC

Notes: 5. AL8806Q does not have a low power standby mode but current consumption is reduced when output switch is inhibited: V

6. Refer to figure 5 for the device derating curve.

7. Measured on an FR4 51x51mm PCB with 2oz copper standing in still air with minimum recommended pad layout on top layer and thermal vias to bottom

8. Dominant conduction path via exposed pad. Refer to figure 5 for the device derating curve.

Operating Input Voltage relative to GND 6.0 30 V

Voltage High for PWM Dimming Relative to GND 2.6 5.5 V

Voltage range for 20% to 100% DC Dimming Relative to GND 0.5 2.5 V

Voltage Low for PWM Dimming Relative to GND 0 0.4 V

Maximum Switching Frequency — 1 MHz

Continuous Switch Current — 1.5 A

Junction Temperature Range -40 +125 °C

= 12V, TA = +25°C, unless otherwise specified.)

IN

Internal regulator start up threshold

Internal regulator hysteresis threshold

VIN rising

VIN falling

Quiescent current Output not switching

Input supply Current CTRL pin floating f = 250kHz

Set current Threshold Voltage

V

Set threshold hysteresis — — ±20 — mV

SET pin input current

V

CTRL pin input resistance Referred to internal reference — 50 — kΩ

Internal Reference Voltage — — 2.5 — V

On Resistance of SW MOSFET

Switch leakage current

Thermal Resistance Junction-to­Ambient (Note 6)

Thermal Resistance Junction-to-Case
(Note 6)

with V

layer maximum area ground plane. For better thermal performance, larger copper pad for heat-sink is needed.

CTRL

≤ 2.5V

ISW = 1A

VIN = 30V

(Note 7) — 69 —

(Note 7) — 4.3 —

= +25°C, unless otherwise specified.)

A

(Note 5)

≥ 2.6V or floating.

CTRL

= VIN-0.1

SET

—

100

—

—

—

—

5.9 V

300 mV

— 350 µA

1.8 5 mA

95 100 105 mV

— 16 22 µA

— 0.18 0.35 Ω

— — 0.5 μA

°C/W

= 0V. Parameter is tested

SENSE

AL8806Q

Document number: DS36905 Rev. 1 - 2

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0

0

CUR

RENT

Typical Performance Characteristics (@T

40

V = 0V

CTRL

V = V

350

300

250

200



IN

I (µA)

150

100

50

SET IN

T = 25C

°

A

0

0 5 10 15 20 25 30

V (V)

IN

Supp ly Curr ent (not switching) v s. Input Current

1.6

1.4

T = 25°C

A

L =68 µH

R = 68m

SET

Ω

= +25°C, unless otherwise specified.)

A

90

L = 33µ H

800

700

600

L = 68µ H

500

400

Freque ncy (kHz)

300

200

L = 100 µ H

100

0

012 34 5

80

V = V = 12V

SE T I N

T = 25C

60

A

V(V)

CTRL

Switching Frequency vs. V

°

L8806Q

V = 12V

IN

1 LED
R = 150m

SET

T = 25°C

A

CTRL

Ω

1.2

R = 100m

(A)

1

0.8

SET

R = 150m

SET

0.6

LED

0.4

0.2

0

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5

CTRL VOLTAGE (V)

LED Current vs. V

CTRL

3

2.5

2

1.5

CTRL

V (V)

1

0.5

V= Open

CTRL

V = V

SE T IN

T = 25C

A

Ω

40

20

Ω

CTRL

I (µA)

0

-20

-40

-60

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V (V)

CTRL

I vs V

CTRL CTRL

2.52

V = Open

CTRL

V = V = 12V

SET I N

2.51

2.50

CTRL

V (V)

2.49

°

0

0 5 10 15 20 25 30

V (V)
V vs. In put Voltag e
(CTRL pin o pen circuit)

IN

CTRL

2.48

-40 -15 10 35 60 85 110
Ambient Temperature (°C)

V vs. Temperature

CTRL

AL8806Q

Document number: DS36905 Rev. 1 - 2

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R (m

Typical Performance Characteristics (cont.) (@T

5.0

V = 12V

4.5

4.0

IN

1 LED
R = 150m

SET

L = 68µ H

3.5

3.0

2.5

LED Current Er ror

2.0

I

LED Current Error (%)

1.5

LED

1.0

0.5

0.0
0% 20% 40 % 60 % 80 % 10 0%

PWM Duty Cycle

I vs. PWM Duty Cycle

LED

260

240

220

)

200

Ω

180

DS(ON)

160

140

120

100

-40 -15 10 35 60 85 110

V = Open

CTRL

V = V 12V

SET IN

AMBIENT TEMPERATURE (°C)

SW R vs. Temperature

100%

90%

80%

DS(ON)

L = 33µ H
R = 150m

SET

T = 25C

A

2 LED

70%

1

0.9

Ω

0.8

0.7

0.6

0.5

0.4
LED Current (A)

0.3

0.2

0.1

0

Ω

°

= +25°C, unless otherwise specified.)

A

200

180

160

140

Ω

120

100

DS(ON)

80

R (m)

60

40

20

0

0 5 10 15

R vs. Input Voltage

DS(ON)

130

125

120

V

SE NS E

11 5

11 0

105

SEN SE

100

V (mV)

95

90

85

80

024 68

SW Output Switching Characteristi cs

V (V)

IN

R = 150m

SET

L = 68µ H
V = 12V

IN

1 LED Load

Time (µs)

V = Open

CTRL

V = V 12V

SET IN

T = 25C

°

A

20 25 30

V

SW

Ω

L8806Q

18

16

14

12

10

8

SW

V

6

4

2

0

-2

60%

50%

Duty Cycle

40%

30%

20%

10%

0%

6 9 12 15 18 21 24 27 30

Input Voltage ( V)

Duty Cycle vs. Inpu t Voltage

AL8806Q

Document number: DS36905 Rev. 1 - 2

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%

Typical Performance Characteristics (cont.) (@T

10%

8%

6%

4%

2%

0%

% ERROR

-2%

-4%

1.5A Nominal LED Current 1.0A Nominal LED Current

5 LEDs

6 LEDs

7 LEDs

8 LEDs

2 LEDs

1 LED

4 LEDs

3 LEDs

= +25°C, unless otherwise specified.)

A

10%

8%

6%

2 LEDs

4%

3 LEDs

4 LEDs

2%

1 LED

0%

-2%

DEVIATION

-4%

5 LEDs

6 LEDs

L8806Q

7 LEDs

8 LEDs

-6%

T = 25°C

A

L = 33µ H

-8%

R = 66.67m

-10%

S

6 9 12 15 18 21 24 27 30

Ω

INPUT VOLTAGE (V)

700

T = 25°C

A

L = 33µH

600

R = 66.67m

S

Ω

500

400

300

200

1 LED

100

SWITCHING FREQUENCY (kHZ)

0

2 LEDs

3 LEDs

4 LEDs 5 LEDs

6 LEDs 7 LEDs

6 9 12 15 18 21 24 27 30

INPUT VOLTAGE (V)

100%

7 LEDs

6 LEDs

5 LEDs

4 LEDs

95%

3 LEDs

8 LEDs

8 LEDs

-6%

T = 25°C

A

L = 33µH

-8%

R = 100m

-10%
6 9 12 15 18 21 24 27 30

Ω

S

INPUT VOLTAGE (V)

700

T = 25°C

A

L = 33µH

600

R = 100m

Ω

S

500

400

300

200

1 LED

SWITCHING FREQUENCY (kHz)

100

2 LEDs

3 LEDs

4 LEDs

5 LEDs

0

6 LEDs

7 LEDs

8 LEDs

6 9 12 15 18 21 24 27 30

100

95%

2 LEDs

INPUT VOLTAGE (V)

5 LEDs

4 LEDs

3 LEDs

6 LEDs

7 LEDs

8 LEDs

2 LEDs

90%

85%

1 LED

80%

T = 25°C

A

L = 33µ H
R = 66.67m

75%

S

6 9 12 15 18 21 24 27 30

Ω

INPUT VOLTAGE (V)

90%

1 LED

85%

EFFICIENCY

80%

T = 25°C

A

L = 33µH
R = 100m

75%

6 9 12 15 18 21 24 27 30

Ω

S

INPUT VOLTAGE (V)

AL8806Q

Document number: DS36905 Rev. 1 - 2

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L8806Q

Application Information

AL8806Q Operation

In normal operation, when voltage is applied at VIN, the AL8806Q internal switch is turned on. Current starts to flow through sense resistor R

inductor L1, and the LEDs. The current ramps up linearly, and the ramp rate is determined by the input voltage V

and the inductor L1.

IN

SET

,

Figure 1 Typical Application Circuit

This rising current produces a voltage ramp across R

. The internal circuit of the AL8806Q senses the voltage across R

SET

and applies a

SET

proportional voltage to the input of the internal comparator.

When this voltage reaches an internally set upper threshold, the internal switch is turned off. The inductor current continues to flow through R

SET

L1, the LEDs and the schottky diode D1, and back to the supply rail, but it decays, with the rate of decay determined by the forward voltage drop of

the LEDs and the schottky diode.

This decaying current produces a falling voltage at R

, which is sensed by the AL8806Q. A voltage proportional to the sense voltage across R

1

SET

is

applied at the input of the internal comparator. When this voltage falls to the internally set lower threshold, the internal switch is turned on again.

This switch-on-and-off cycle continues to provide the average LED current set by the sense resistor R

SET

.

LED Current Control

The LED current is controlled by the resistor R

Connected between V

and SET the nominal average output current in the LED(s) is defined as:

IN

If the CTRL pin is driven by an external voltage (higher than 0.4V and lower than 2.5V), the average LED current is:

For example for a desired LED current of 1.33A and a default voltage V

in Figure 1.

SET

R

SET

V

I

LED

THD

I =

LED

V

V

THD

I =

LED

V

V

CTRL

CTRL

V

REF

R

SET

V

CTRL

THD

R

SET

REF

=2.5V the resulting resistor is:

5.2

1.0

5.2

33.1

Ω≈== m75

Analog Dimming

The CTRL pin can be driven by an external DC voltage (V

. The LED current decreases linearly with the CTRL voltage when 0.5V ≤ V

R

SET

AL8806Q

Document number: DS36905 Rev. 1 - 2

), to adjust the output current to a value below the nominal average value defined by

CTRL

≤ 2.5V, as shown on page 4 for 4 different current levels.

CTRL

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,

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]

]

L8806Q

Application Information (cont.)

Analog Dimming (cont.)

Note that 100% brightness setting corresponds to V

the device will not overdrive the LED current and will still set the current according to the equation V

When the CTRL voltage falls below the threshold, 0.4V, the output switch is turned off which allows PWM dimming.

PWM Dimming

LED current can be adjusted digitally, by applying a low frequency Pulse Width Modulated (PWM) logic signal to the CTRL pin to turn the device on

and off. This will produce an average output current proportional to the duty cycle of the control signal. In particular, a PWM signal with a max

resolution of 10bit can be applied to the CTRL pin to change the output current to a value below the nominal average value set by resistor R

achieve this resolution the PWM frequency has to be lower than 500Hz, however higher dimming frequencies can be used - at the expense of

dimming dynamic range and accuracy.

Typically, for a PWM frequency of 500Hz the accuracy is better than 1% for PWM ranging from 1% to 100%.

700

600

CTRL

= V

, nominally 2.5V. For any voltage applied on the CTRL pin that is higher than V

REF

= V

REF

.

CTRL

SET

REF

. To

,

500

400

300

200

LED current [mA

100

0

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

PWM dimming [%]

70

60

50

40

30

20

LED current [mA

10

Figure 2 PWM Dimming at 500Hz

0

0% 1% 2% 3% 4% 5% 6% 7% 8% 9% 10%

PWM dimming [%]

The PWM pin is designed to be driven by both 3.3V and 5V logic levels directly from a logic output with either an open drain output or push-pull

output stage.

AL8806Q

Document number: DS36905 Rev. 1 - 2

Figure 3 Low duty cycle PWM Dimming at 500Hz

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L8806Q

Application Information (cont.)

Soft Start

The AL8806Q does not have in-built soft-start action – this provides very fast turn off of the output the stage improving PWM dimming accuracy;

nonetheless, adding an external capacitor from the CTRL pin to ground will provide a soft-start delay. This is achieved by increasing the time taken

for the CTRL voltage to rise to the turn-on threshold and by slowing down the rate of rise of the control voltage at the input of the comparator.

Adding a capacitor increases the time taken for the output to reach 90% of its final value, this delay is 0.1ms/nF, but will impact on the PWM

dimming accuracy depending on the delay introduced.

Figure 4 Soft Start with 22nF Capacitor on CTRL pin (V

AL8806Q

Document number: DS36905 Rev. 1 - 2

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= 30V, I

IN

= 667mA, 1 LED)

LED

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L8806Q

Application Information (cont.)

Reducing Output Ripple

Peak to peak ripple current in the LED(s) can be reduced, if required, by shunting a capacitor C2 across the LED(s) as shown already in the circuit

schematic.

A value of 1μF will reduce the supply ripple current by a factor three (approx.). Proportionally lower ripple can be achieved with higher capacitor

values. Note that the capacitor will not affect operating frequency or efficiency, but it will increase start-up delay, by reducing the rate of rise of

LED voltage. By adding this capacitor the current waveform through the LED(s) changes from a triangular ramp to a more sinusoidal version

without altering the mean current value.

Capacitor Selection

The small size of ceramic capacitors makes them ideal for AL8806Q applications. X5R and X7R types are recommended because they retain their

capacitance over wider voltage and temperature ranges than other types such as Z5U.

A 2.2μF input capacitor is sufficient for most intended applications of AL8806Q; however a 4.7μF input capacitor is suggested for input voltages

approaching 30V.

Diode Selection

For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode with low reverse leakage at the

maximum operating voltage and temperature. The Schottky diode also provides better efficiency than silicon PN diodes, due to a combination of

lower forward voltage and reduced recovery time.

It is important to select parts with a peak current rating above the peak coil current and a continuous current rating higher than the maximum output

load current. In particular, it is recommended to have a diode voltage rating at least 15% higher than the operating voltage to ensure safe operation

during the switching and a current rating at least 10% higher than the average diode current. The power rating is verified by calculating the power

loss through the diode.

Schottky diodes, e.g. B240 or B140, with their low forward voltage drop and fast reverse recovery, are the ideal choice for AL8806Q applications.

Thermal and Layout Considerations

For continuous conduction mode of operation, the absolute maximum junction temperature must not be exceeded. The maximum power dissipation

depends on several factors: the thermal resistance of the IC package θ

and ambient temperature.

The maximum power dissipation can be calculated using the following formula:

= (T

P

D(MAX)

The recommended maximum operating junction temperature, T

junction to ambient thermal resistance, θ

thermally enhanced MSOP-8EP package.

θ

, is layout dependent and the AL8806Q’s θJA in MSOP-8EP on a

JA

51 x 51mm double layer PCB with 2oz copper standing in still air is

approximately 69°C/W.

Therefore the maximum power dissipation at T

P

Figure 5, shows the power derating of the AL8806Q on an FR4

51x51mm PCB with 2oz copper standing in still air.

As the ambient temperature increases and/or the PCB area reduces

the maximum allowable power dissipated by the AL8806Q will

decrease.

()

=

)MAX(D

AL8806Q

Document number: DS36905 Rev. 1 - 2

J(MAX)

°

− TA) / θJA

, is 125°C and so maximum ambient temperature is determined by the AL8806Q’s

J

. To support high LED drive at higher ambient temperatures the AL8806Q has been packaged in

JA

= 25°C is:

A

C25C125

°−°

W/C69

W45.1

=

www.diodes.com

, PCB layout, airflow surrounding the IC, and difference between junction

JA

where

is the maximum operating junction temperature,

T

J(MAX)

is the ambient temperature, and

T

A

is the junction to ambient thermal resistance.

θ

JA

1600

10 of 13

1400

1200

1000

800

600

400

Power dissipation (mW)

200

0

-40 -25 -10 5 20 35 50 65 80 95 110 125

MSOP-8EP

Ambient temperature (°C)

Figure 5 Derating Curve

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L8806Q

Application Information

EMI and PCB Layout Considerations

The AL8806Q is a switching regulator with fast edges and measures small differential voltages; as a result of this care has to be taken with

decoupling and layout of the PCB.To help with these effects the AL8807Q has been developed to minimise radiated emissions by controlling the

switching speeds of the internal power MOSFET. The rise and fall times are controlled to get the right compromise between power dissipation due

to switching losses and radiated EMI. The turn-on edge (falling edge) dominates the radiated EMI which is due to an interaction between the

Schottky diode (D1), Switching MOSFET and PCB tracks. After the Schottky diode reverse recovery time of around 5ns has occurred; the falling

edge of the SW pin sees a resonant loop between the Schottky diode capacitance and the track inductance, L

(cont.)

, See figure 6.

TRACK

The tracks from the SW pin to the Anode of the Schottky diode, D1, and then from D1’s cathode to the decoupling capacitors C1 should be as short

as possible. There is an inductance internally in the AL8807Q this can be assumed to be around 1nH. For PCB tracks a figure of 0.5nH per mm

can be used to estimate the primary resonant frequency. If the track is capable of handling 1A increasing the thickness will have a minor effect on

the inductance and length will dominate the size of the inductance. The resonant frequency of any oscillation is determined by the combined

inductance in the track and the effective capacitance of the Schottky diode.

Recommendations for minimising radiated EMI and other transients and thermal considerations are:

1. The decoupling capacitor (C1) has to be placed as close as possible to the V

2. The freewheeling diode’s (D1) anode, the SW pin and the inductor have to be placed as close as possible to each other to avoid ringing.

3. The Ground return path from C1 must be a low impedance path with the ground plane as large as possible

4. The LED current sense resistor (R1) has to be placed as close as possible to the V

5. The majority of the conducted heat from the AL8807Q is through the GND pin 2. A maximum earth plane with thermal vias into a second

earth plane will minimise self-heating

6. To reduce emissions via long leads on the supply input and LEDs low RF impedance capacitors (C2 and C5) should be used at the point

AL8806Q

Document number: DS36905 Rev. 1 - 2

the wires are joined to the PCB

Figure 6 PCB Loop Resonance

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pin and D1 Cathode

IN

and SET pins.

IN

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Ordering Information

L8806Q

Part Number Package Code

AL8806QMP-13

Note: 9. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf

10. AL8806Q have been qualified to AEC-Q100 grade 1 and is classified as “Automotive Grade” which supports PPAP documentation.
See AL8806 datasheet for commercial qualified versions.

MP MSOP-8EP 2500 12mm -13 Automotive Grade

Packaging

(Note 9)

Quantity Tape Width Part Number Suffix

Packing: 13” Tape and Reel Qualification Grade

Marking Information

(1) MSOP-8EP

Part Number Package

AL8806QMP8-13 MSOP-8EP

Package Outline Dimensions

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

y

A

AL8806Q

Document number: DS36905 Rev. 1 - 2

D

x

1

e

A

1

D

E

E

2

8Xb

A

3

A

2

(All dimensions in mm.)

D

1

Gauge Plane

Seating Plane

E

3

E

1

See Detail

C

www.diodes.com

5
2

.

0

4

X

1

0

c

12 of 13

Dim Min Max Typ

4

X

1

0

°

A
A1
A2
A3

b

c

a

°

Detail

L

C

D
D1

E
E1
E2
E3

e

L

a

x

y

All Dimensions in mm

(Note 10)

MSOP-8EP

- 1.10 -

0.05 0.15 0.10

0.75 0.95 0.86

0.29 0.49 0.39

0.22 0.38 0.30

0.08 0.23 0.15

2.90 3.10 3.00

1.60 2.00 1.80

4.70 5.10 4.90

2.90 3.10 3.00

1.30 1.70 1.50

2.85 3.05 2.95

- - 0.65

0.40 0.80 0.60
0° 8° 4°

- - 0.750

- - 0.750

April 2014

© Diodes Incorporated

A

L8806Q

Suggested Pad Layout

Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
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indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the

labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.

Copyright © 2014, Diodes Incorporated

www.diodes.com

Y2

G

X C

X1

Y

Y1

IMPORTANT NOTICE

LIFE SUPPORT

Dimensions

C 0.650
G 0.450
X 0.450

X1 2.000

Y 1.350
Y1 1.700
Y2 5.300

Value

(in mm)

AL8806Q

Document number: DS36905 Rev. 1 - 2

13 of 13

www.diodes.com

April 2014

© Diodes Incorporated