ULN2803APG5M - 8ch 50V/500mA Darlington Sink Driver | Toshiba
N.º da peça: ULN2803APG5M ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.95 | $1,95 |
| 10 | $1.62 | $16,20 |
| 100 | $1.18 | $118,00 |
| 500 | $0.92 | $460,00 |
| 1.000 | $0.78 | $780,00 |
ULN2803APG5M Visão geral
A Darlington transistor array is a class of bipolar driver in which two transistors are cascaded (collector of the input transistor tied to the base of the output transistor) so that the input sees only the very small base current of the first device, while the output stage delivers the load current. The resulting current gain (hFE) of several thousand allows logic-level signals (5 V CMOS, 3.3 V TTL, or even microcontroller GPIO) to directly switch much higher currents and voltages. Within the broader taxonomy, the ULN2803APG5M belongs to the Bipolar Transistor Array (BJT array) family, sits inside the Power Management / Interface & Driver category, and ultimately functions as a low-side (sink) driver. The integral freewheeling clamp diodes across each output protect the IC when driving relays, solenoids, and motors from the inductive kick that would otherwise destroy the output transistors.
Key differentiating features include eight parallel channels in one package (saving PCB area versus discrete transistors), 50 V rating that comfortably covers 24 V industrial and automotive relays, 500 mA continuous per channel (higher peaks possible within SOA limits), built-in input resistors for direct 5 V logic compatibility, and the 18-DIP through-hole footprint that remains the industry standard for breadboarding, legacy designs, and pin-compatible cross-brand substitutions. Compared with discrete MOSFETs, the Darlington array offers simpler drive and lower BOM cost but trades away switching speed, so it is best suited for slow on/off actuation rather than high-frequency PWM.
The architecture uses eight common-emitter Darlington switches whose emitters are tied to a common ground pin, while each open collector is brought out separately to a DIP pin. The clamp diode anode connects to Vsup and cathode to each collector, suppressing flyback voltage transients. Total power dissipation of 760 mW for the package (about 95 mW per channel continuous) defines the safe envelope.
Typical applications include 5 V logic-to-24 V relay driver boards, stepper motor phase drivers for small unipolar motors, solenoid and valve drivers, LED matrix row/column drivers, thermal printer head drivers, and lamp/indicator banks. When designing with this device, always verify package dissipation against the worst-case simultaneous-channel conduction: eight 100 mA outputs will exceed the 760 mW package rating unless derated.
Alternativas drop-in para ULN2803APG5M — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ULN2803APG5M (mesmo formato e footprint) — diferindo em Package, Mounting Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ULN2803APG
✅ Drop-In✓ Em estoque
$1.18 / unidade
Ver ficha técnica →ULN2803ADWR
✅ Drop-In✓ Em estoque
$0.38 / unidade
Ver ficha técnica →ULN2803AN
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ULN2803ADWR
✅ Drop-In✓ Em estoque
$0.38 / unidade
Ver ficha técnica →ULN2803ADWR
✅ Drop-In✓ Em estoque
$0.38 / unidade
Ver ficha técnica →ULN2803ADWR
✅ Drop-In✓ Em estoque
$0.38 / unidade
Ver ficha técnica →ULN2803APG5M Classificações máximas e características elétricas
| Manufacturer | Toshiba |
| Product Type | Darlington Transistor Array (8-ch sink driver) |
| Number of Channels | 8 |
| Transistor Configuration | 8 NPN Darlington pairs, common emitter, open-collector outputs |
| Tensão coletor-emissor (Vceo) | 50 V |
| Continuous Collector Current (per channel) | 500 mA |
| Total Package Power Dissipation | 760 mW |
| Integral Clamp Diodes | Yes (freewheeling diodes for inductive loads) |
| Input Compatibility | 5 V CMOS / TTL logic, with internal base resistors |
| Encapsulamento | 18-DIP (through-hole) |
| Tipo de montagem | Through-Hole |
| Order Code Suffix | (5,M) = 5-piece pack, manufacturer flow |
Configuração de pinos do ULN2803APG5M
| Pino 1 | IN1 — Base input for channel 1 (logic-level) |
| Pino 2 | IN2 — Base input for channel 2 |
| Pino 3 | IN3 — Base input for channel 3 |
| Pino 4 | IN4 — Base input for channel 4 |
| Pino 5 | IN5 — Base input for channel 5 |
| Pino 6 | IN6 — Base input for channel 6 |
| Pino 7 | IN7 — Base input for channel 7 |
| Pino 8 | IN8 — Base input for channel 8 |
| Pino 9 | Vsup (COM) — Common anode connection for the 8 freewheeling clamp diodes - tie to positive supply |
| Pino 10 | GND — Common emitter for all 8 Darlington pairs (ground) |
| Pino 11 | OUT1 — Open-collector output for channel 1 |
| Pino 12 | OUT2 — Open-collector output for channel 2 |
| Pino 13 | OUT3 — Open-collector output for channel 3 |
| Pino 14 | OUT4 — Open-collector output for channel 4 |
| Pino 15 | OUT5 — Open-collector output for channel 5 |
| Pino 16 | OUT6 — Open-collector output for channel 6 |
| Pino 17 | OUT7 — Open-collector output for channel 7 |
| Pino 18 | OUT8 — Open-collector output for channel 8 |
Aplicações típicas
ULN2803APG5M é adequado para 6 aplicaçãos: 5V Logic to 24V Relay Driver Board, Unipolar Stepper Motor Phase Driver, Solenoid and Valve Driver Array, LED Matrix Row/Column Driver, Thermal Printer Head Driver, Lamp and Indicator Bank Driver.
5V Logic to 24V Relay Driver Board
The Toshiba ULN2803APG5M is the classic interface between a 5 V microcontroller (Arduino, PIC, STM32 GPIO at 3.3 V with TTL thresholds) and a bank of 24 V automotive or industrial relays. Each of the 8 Darlington pairs sinks up to 500 mA at 50 V, comfortably handling 24 V coil current, while the internal clamp diodes absorb the relay coil's inductive kick. Connect the logic high output to the input pin (pins 1-8), the relay coil between V+ and the open-collector output (pins 11-18), and pin 9 to V+ for the clamp diode return. Compared with discrete MOSFETs, this single 18-DIP IC replaces 8 transistors, 8 base resistors, and 8 flyback diodes, dramatically reducing BOM cost.
Recomendado
Unipolar Stepper Motor Phase Driver
For small unipolar stepper motors (28BYJ-48, 35BYJ-46), the ULN2803APG5M's four channels drive the four stator windings directly, with the other four channels reserved for a second motor or auxiliary loads. Each Darlington sinks 500 mA continuous - more than the 200-240 mA typical of these motors - and the 50 V rating covers the back-EMF spikes when chopping at low PWM rates. The slow switching (~us transitions, not ns) makes this array suitable only for low-speed stepping; high-speed operation requires discrete MOSFETs. The integral clamp diodes eliminate the external flyback network usually required when driving stepper phases with discrete transistors.
Recomendado
Solenoid and Valve Driver Array
Industrial solenoid valves, pneumatic actuators, and irrigation valves draw 200-500 mA at 12-24 V - squarely within the ULN2803APG5M's per-channel rating. One DIP drives 8 valves from 8 logic outputs, replacing dozens of discrete components. The integral freewheeling diodes protect against the solenoid's inductive flyback when de-energized, and the 50 V VCEO rating provides margin above 24 V supply rails. Designers must check that simultaneous activation of all 8 valves does not exceed 760 mW package dissipation; if so, stagger channels or derate by duty cycle.
Recomendado
LED Matrix Row/Column Driver
The ULN2803APG5M's 8-channel sink capability makes it a natural row or column driver for 8x8 monochromatic LED matrices, 7-segment displays, or large 7-segment multiplexed digit banks. Each channel sinks up to 500 mA - far more than typical LED segment currents of 10-20 mA - so a single resistor per segment limits current to safe values. The 18-DIP package is breadboard-friendly for prototypes and remains a low-cost choice for educational kits and hobbyist electronics where thousands of boards are produced annually.
Recomendado
Thermal Printer Head Driver
Thermal receipt printers (POS, label) and dot-matrix thermal print heads use hundreds of heating dots, but the addressing logic typically groups them into 8-bit columns driven by Darlington arrays. The ULN2803APG5M's 500 mA per channel and 50 V rating match the thermal-element voltage and current requirements. The slow switching is acceptable because thermal print heads switch at millisecond rates. Multiple ULN2803APG5M ICs in parallel can drive higher-density print heads (e.g., 384 dots via 48 channels of 6 ICs).
Recomendado
Lamp and Indicator Bank Driver
Panel-mounted indicator lamps (24 V aircraft, marine, industrial annunciators) and Christmas-light / signage strings are easily driven by the ULN2803APG5M. Each channel handles up to 500 mA, allowing several small lamps in parallel per channel. The 18-DIP through-hole package withstands the vibration and thermal cycling typical of industrial panels. Compared with electromechanical relays, the Darlington array offers silent operation, no contact bounce, and millions of switching cycles - ideal for status indicators, annunciator panels, and decorative lighting control.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ULN2803APG5M — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ULN2803APG | ULN2803A | ULN2803AN | ULN2803A (ST) | ULN2803 (Diodes Inc) | ULN2803A (onsemi) |
|---|---|---|---|---|---|---|---|
| Package | 18-DIP (through-hole) | 18-DIP - same | 18-DIP - same (TI) | 18-DIP / PDIP - same | 18-DIP - same | 18-DIP - same | 18-DIP - same |
| Brand | Toshiba | Toshiba (same) | Texas Instruments | Texas Instruments | STMicroelectronics | Diodes Incorporated | onsemi |
| Number of Channels | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Collector-Emitter Voltage (VCEO) | 50 V | 50 V | 50 V | 50 V | 50 V | 50 V | 50 V |
| Continuous Collector Current (per channel) | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA |
| Integral Clamp Diodes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Order Code Suffix | (5,M) = 5-pc pack | Standard tube/tray | TI standard | TI PDIP standard | ST standard | Diodes Inc standard | onsemi standard |
Principais diferenciais
- 8 channels in a single 18-DIP through-hole package (vs Discrete 8x NPN transistors + 8 base resistors + 8 flyback diodes)
- Integrated freewheeling clamp diodes (vs Discrete MOSFET drivers (e.g., discrete IRF540N + external flyback diodes))
- Logic-level inputs with internal base resistors (vs Discrete bipolar transistors requiring external base resistors)
Notas de projeto
Total package dissipation is limited to 760 mW. With each Darlington's on-state saturation of approximately 1 V, eight channels continuously at 100 mA dissipate 0.8 W - right at the limit. Derate by duty cycle (PWM) or limit simultaneous ON channels. If high continuous current is needed across all 8 channels, mount the 18-DIP in free air with copper pours on both sides of the PCB acting as a heatsink, or select a lower-current alternative.
Connect pin 9 (Vsup / COM) to the positive supply rail of your inductive loads (e.g., +24 V). Without this connection, the clamp diodes cannot return energy and inductive flyback will destroy the output transistors. Place a 100 nF decoupling capacitor between Vsup and GND close to the IC, plus a bulk electrolytic (10-100 uF) on the same rails for additional protection against large inductive transients.
Common mistakes: (1) forgetting to connect pin 9 to the load supply, leaving the clamp diodes disconnected; (2) exceeding the 50 V VCEO by switching a 48 V supply with large transient overshoot - add a transient suppressor (TVS); (3) assuming Darlington = MOSFET and using high-frequency PWM - the slow switching and high saturation loss will dissipate excessive power; (4) forgetting that the outputs are open-collector, so the load must be connected to a positive supply, not to ground.
Informações de conformidade
Toshiba generally ships lead-free / RoHS-compliant DIP parts, but the verified web data did not state the compliance verbatim for this specific MPN; explicit RoHS/REACH declarations should be confirmed via the Toshiba product page. AEC-Q100 is not applicable (industrial/commercial part).
