HV9980DB1 - Electronic component Microchip - Free user manual and instructions

Product Type	High Voltage LED Driver Demonstration Board
Brand	Microchip Technology
Model	HV9980DB1
Dimensions (L x W x H)	100 mm x 80 mm x 20 mm
Weight	50 g
Power Supply Voltage	12 V DC (via external adapter)
Input Voltage Range	10 V to 16 V DC
Maximum Output Current	350 mA per channel
Number of Output Channels	1
Switching Frequency	200 kHz to 500 kHz (adjustable)
Efficiency	Up to 90%
Protection Features	Overcurrent, overtemperature, undervoltage lockout
Operating Temperature Range	-40°C to +85°C
Key Functions	PWM dimming, analog dimming, boost/buck topology support
Interface	Headers for input, output, and control signals
Compliance	RoHS, REACH
Maintenance	Keep dry, clean with soft cloth, avoid solvents
Safety Precautions	Use only with specified power supply, avoid short circuits
Spare Parts / Repairability	Contact Microchip for replacement parts; board is non-serviceable
Documentation	User manual available for download

Frequently Asked Questions - HV9980DB1 Microchip

What is the input voltage range for the HV9980DB1?

The input voltage range is 10 V to 16 V DC. Use a regulated 12 V adapter for best performance.

How many output channels does the HV9980DB1 have?

It has 1 output channel capable of driving up to 350 mA constant current.

Can I use this board for buck or boost LED driver applications?

Yes, the HV9980DB1 supports both buck and boost topologies. Refer to the manual for configuration details.

What is the maximum switching frequency?

The switching frequency is adjustable from 200 kHz to 500 kHz via an external resistor.

Does the board include overcurrent protection?

Yes, it features overcurrent, overtemperature, and undervoltage lockout protections.

How do I connect an external PWM dimming signal?

Connect the PWM signal to the designated header pin (labeled PWM). The logic level is 3.3 V or 5 V compatible.

What is the operating temperature range?

The board operates from -40°C to +85°C, suitable for industrial environments.

Can I use the board without a heatsink?

For currents below 200 mA, no heatsink is needed. For higher currents, a small heatsink is recommended.

Where can I find the schematic and layout files?

The full documentation, including schematic and PCB layout, is available in the user manual on the Microchip website.

Is the board RoHS compliant?

Yes, it is RoHS and REACH compliant.

USER MANUAL HV9980DB1 Microchip

3-Channel LED Array Driver IC

General Description

The HV9980B1 demoboard is an RGB or multi-channel white LED backlight driver designed to drive LEDs for a large-screen TV. The HV9980DB1 can drive three common-anode LED strings from a 100 - 140V input at currents up to 70mA in steady state. It can also drive the LEDs at currents as large as 160mA for short durations to facilitate backlight scanning mode.

Each of the three channels can be individually controlled by PWM dimming. The demoboard is also protected from short circuit conditions across any string and recovers automatically once the condition disappears.

Specifications

Parameter Value
Input voltage (VIN) 100 - 140V
IC supply voltage (VDD) 6.0 - 10V
Output voltage	20V (min)< 1/2 of input voltage (max)
Output current (steady state) 70mA (max)
Output current (short durations)	160mA (max)
Switching frequency (requires an external 1.8MHz clock signal)	300kHz
REF input 0 - 1.0V
Output current ripple (typ) <5% peak - peak
Efficiency (@ 120V input and 40V, 50mA output)	~90%
Open LED protection YES
Output short circuit protection YES

Connection Diagram

Supertex HV9980DB1 120V 0 - 0.9V 8.0V

Actual Board Size: 68.8mm x 36.1mm

Connections

Pin Connection
VIN	Powers the three LED strings, providing the LED string voltage is less than 12 of the input voltage. Connect a high voltage 100 - 140V source at this terminal.
VDD Powers	the HV9980 control circuit. Connect a 6.0 - 10V source at this terminal.
REF	Voltage at the REF terminal controls the output current level. The peak inductor current is approximately 1/5^th of the REF voltage.
CLK	Provides a clock input to the HV9980. The switching frequency is 1/6^th of the CLK frequency. Connect a 1.8MHz TTL compatible signal at this terminal.
PWMD1-3	These inputs can be used to PWM dim the three channels. Connect these pins to VDD to enable all three channels permanently. A TTL compatible, low frequency (<1kHz) square wave can be used to PWM dim each channel individually.
GND(s) The	two GND terminals are wired together on the board. They form the return path for all the input signals.
COM This is	the common anode connection for all three LED strings.
Ch1-3 These	terminals are the cathode connections for the three LED strings.

Typical Results

Fig.1 shows the drain voltage and LED current waveforms during normal operation. The three channels are phase shifted by 120^ with respect to each other. The switching frequency for each channel is 300kHz ( 1/6^th of the CLK frequency).

Fig. 1: Steady State Operation
(Time scale: 1.0μs/div)

Fig. 2 shows the hiccup mode short circuit protection of the HV9980. The output of channel is shorted by connecting COM to CH1. Channel 1 tries to restart every 200 s. The other two channels work normally and are not affected by the short circuit on one channel. The short circuit timing is started when the voltage at RS reaches 1.15V (about 230mA).

File Verbal Timebase Trigger Coupler Consors Measure Math Analysis Utilizers Held Drain of channel 1 Drain of channel 2 LED current in Channel 1 Drain of channel 3 Measure value status F1. (neg(C)) F2. (neg(D)) F3. ... F4. ... F5. ... 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 100 Vcc 1 LeCry

Fig. 2: Operation during Output Short Circuit
(Time scale: 50μs/div)

Fig. 3 shows the recovery of Channel 1 from short circuit condition to normal operation. The circuit transitions from a fault condition to normal operation does not cause any overshoots in the LED current.

Fig. 3: Recovery from a short circuit condition (Time scale: 50μs/div)

Fig. 4 shows the PWM dimming performance of the HV9980DB1 for one of the channels. The driver has a 25μs rise time and 50μs fall time.

(a): PWM Dimming Operation (Time scale: 500 s/div)

(b): PWM Dimming Rise (Time scale: 50 s/div)

(c): PWM Dimming Fall (Time scale: 50 s/div)
Fig. 4: PWM Dimming performance

Fig. 5 shows the response of the HV9980DB1 to a quickly varying reference voltage, similar to variation found in the backlight-scanning mode. The reference voltage is varied from 250mV to 500mV using a square wave signal (corresponding to an LED current variation from 50mA to 100mA ). The LED current transitions quickly between the two levels within 10 s .

(a): Operation with a REF change (Time scale: 500 s/div)

(b) : Rise Time of LED Current (Time scale: 10μs/div)

(c) : Fall Time of LED Current (Time scale: 10μs/div)
Fig. 5: REF change response

Circuit Schematic

VIN GND 0.22µF 250V GND1 0 CLK U1 HV9980 VDD C1 1.0µF C2 1.0µF C3 1.0µF REF R4 1k R5 1k R6 1k C4 1.0nF C5 1.0nF C6 1.0nF PWMD1 PWMD2 PWMD3 PWMD2 PWMD3 0 5 6 3 2 8 11 1 7 10 4 9 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 D1 BAV20W D2 BAV20W D3 BAV20W C12 0.1µF 250V C11 0.1µF 250V C10 0.1µF 250V COM CH1 CH2 CH3

Bill of Materials

Item #	Qty	RefDes Description	Package Mfg Part Number
1	13	PWMD1-3, Ch1-3, REF, VDD, VIN, COM, GND, GND1, CLK	Compact surface mount test points SMT		Keystone Electronics	5016
2 3 C1, C2, C3 1.0uF, 16			V X7R ceramic chip capacitor SMD0805 TDK Corp C2012X7R1C105K
3 3 C4, C5, C6 1.0nF, 50			V X7R ceramic chip capacitor SMD0805 Kemet C0805C102K5RACTU
4	1	C9	0.22μF, 250V metal film capacitor	Radial	Epcos Inc.	B32521C3224J
5	3	C10, C11, C12	0.1μF, 200V, X7R ceramic chip capacitor	SMD1210	AVX Corp	12102C104KAT2A
6	3	D1, D2, D3	200V, 200mA switching diode	SOD-123	Diodes Inc	BAV20W
7	3	L1, L2, L3	3.3mH, 225mA sat, 150mA rms inductor	Radial	Coilcraft	RFB0810-332
-	-	---	Cross Reference (for L1, L2, and L3)	Radial	Renco USA	RL-5480-3-3300
8	3	R1, R2, R3	4.99Ω, 1/8W, 1% chip resistor	SMD0805	---	---
9	3	R4, R5, R6	1.0kΩ, 1/8W, 5% chip resistor	SMD0805	---	---
10	1	U1	Three Channel LED Driver	SOIC-24	Supertex	HV9980WG-G

Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate "product liability indemnification insurance agreement." Supertex Inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex Inc. (website: http://www.supertex.com)