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| Part Number | LM3431MH/NOPB | LM3431MHX/NOPB | LM3431QMH/NOPB | LM3432MH/NOPB | LM3421MH/NOPB | LM3431AMH/NOPB |
|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | National Semiconductor | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Obsolete | Active | Active |
| Type | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Regulator | DC DC Controller | DC DC Controller |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | SEPIC, Step-Down (Buck), Step-Up (Boost) | Step-Up (Boost) |
| Internal Switch(s) | No | No | No | Yes | No | No |
| Number of Outputs | 3 | 3 | 3 | 6 | 1 | 3 |
| Voltage - Supply (Min) | 4.5V | 4.5V | 4.5V | 6V | 4.5V | 4.5V |
| Voltage - Supply (Max) | 36V | 36V | 36V | 40V | 75V | 36V |
| Voltage - Output | - | - | - | 80V | 3V ~ 72V | - |
| Current - Output / Channel | - | - | - | 40mA | - | - |
| Frequency | 1MHz | 1MHz | 1MHz | - | 2MHz | 1MHz |
| Dimming | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM |
| Applications | Backlight | Backlight | Backlight | Backlight | - | Backlight |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 28-PowerTSSOP (0.173", 4.40mm Width) | 28-PowerTSSOP (0.173", 4.40mm Width) | 28-PowerTSSOP (0.173", 4.40mm Width) | 28-PowerTSSOP (0.173", 4.40mm Width) | 16-PowerTSSOP (0.173", 4.40mm Width) | 28-PowerTSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 28-HTSSOP | 28-HTSSOP | 28-HTSSOP | 28-HTSSOP | 16-HTSSOP | 28-HTSSOP |
