Datasheet MAX25600 (Maxim) - 9
| Manufacturer | Maxim |
| Description | Synchronous High Voltage 4 Switch Buck Boost LED Controller |
| Pages / Page | 24 / 9 — Pin Description. PIN. NAME. FUNCTION. TQFN. TSSOP |
| File Format / Size | PDF / 1.3 Mb |
| Document Language | English |
Pin Description. PIN. NAME. FUNCTION. TQFN. TSSOP
Model Line for this Datasheet
Text Version of Document
link to page 14 link to page 14 link to page 14 link to page 17 MAX25600 Synchronous High-Voltage Four-Switch Buck- Boost LED Controller
Pin Description PIN NAME FUNCTION TQFN TSSOP
1 5 DH1 Top Gate Drive for Buck Section of the MAX25600. Drives the gate of the top n-channel MOSFET. 2 6 LX1 Buck-Side Switching Node. LX1 pin swings from a diode voltage drop below ground up to VIN. 3 7 DL1 Bottom Gate Drive for Buck Section of the MAX25600. Drives the gate of the bottom n-channel MOSFET. 4 8 PGND Power Ground Connection 5 9 DL2 Bottom Gate Drive for the Boost Section of the MAX25600. Drives the gate of the bottom n-channel MOSFET. 6 10 LX2 Switching Node of Boost Section of the MAX25600. LX2 pin swings from a diode voltage drop below ground up to VOUT. 7 11 DH2 Top Gate Drive for Boost Section of the MAX25600. Drives the gate of the top n-channel MOSFET. 8 12 BST2 High-Side Power Supply for High-Side Gate Drive for Boost Section. Connect a 0.1μF ceramic capacitor from BST2 to LX2. 9 13 CSP Positive Input to the Current-Sense Comparator for the Average-Current-Mode Controller 10 14 CSN Negative Input to the Current-Sense Comparator for the Average-Current-Mode Controller 11 15 ISP Positive LED Current-Sense Input. The voltage between ISP and ISN is proportionally regulated to 1.3V or (VICTRL - 0.2)/(5 x RCS_LED), whichever is less. 12 16 ISN Negative LED Current-Sense Input 13 17 DIMOUT External Dimming p-Channel MOSFET Gate Driver Overvoltage-Protection Input for the LED String. Connect a resistive divider between the output, FB, and GND. When the voltage on FB exceeds 1.23V, a fast-acting comparator immediately stops PWM switching and pulls DIMOUT high to disconnect the LED string from the output. 14 18 FB (R V FB1 + RFB2) OVP = 1.23 RFB2 15 19 FLT Active-Low, Open-Drain Fault Indicator Output. See the Fault Indicator (FLT) section. 16 20 COMP Compensation-Network Connection. For proper compensation, connect a suitable RC network from COMP to SGND. 17 21 SGND Signal Ground Connection 18 22 V 5V Regulator Output. Connect a minimum 2.2μF ceramic capacitor from VCC to SGND for CC stable operation. 19 23 SS Soft-Start Pin. A minimum 10nF capacitor is recommended on this pin. www.maximintegrated.com Maxim Integrated │ 9
Pin Description PIN NAME FUNCTION TQFN TSSOP
1 5 DH1 Top Gate Drive for Buck Section of the MAX25600. Drives the gate of the top n-channel MOSFET. 2 6 LX1 Buck-Side Switching Node. LX1 pin swings from a diode voltage drop below ground up to VIN. 3 7 DL1 Bottom Gate Drive for Buck Section of the MAX25600. Drives the gate of the bottom n-channel MOSFET. 4 8 PGND Power Ground Connection 5 9 DL2 Bottom Gate Drive for the Boost Section of the MAX25600. Drives the gate of the bottom n-channel MOSFET. 6 10 LX2 Switching Node of Boost Section of the MAX25600. LX2 pin swings from a diode voltage drop below ground up to VOUT. 7 11 DH2 Top Gate Drive for Boost Section of the MAX25600. Drives the gate of the top n-channel MOSFET. 8 12 BST2 High-Side Power Supply for High-Side Gate Drive for Boost Section. Connect a 0.1μF ceramic capacitor from BST2 to LX2. 9 13 CSP Positive Input to the Current-Sense Comparator for the Average-Current-Mode Controller 10 14 CSN Negative Input to the Current-Sense Comparator for the Average-Current-Mode Controller 11 15 ISP Positive LED Current-Sense Input. The voltage between ISP and ISN is proportionally regulated to 1.3V or (VICTRL - 0.2)/(5 x RCS_LED), whichever is less. 12 16 ISN Negative LED Current-Sense Input 13 17 DIMOUT External Dimming p-Channel MOSFET Gate Driver Overvoltage-Protection Input for the LED String. Connect a resistive divider between the output, FB, and GND. When the voltage on FB exceeds 1.23V, a fast-acting comparator immediately stops PWM switching and pulls DIMOUT high to disconnect the LED string from the output. 14 18 FB (R V FB1 + RFB2) OVP = 1.23 RFB2 15 19 FLT Active-Low, Open-Drain Fault Indicator Output. See the Fault Indicator (FLT) section. 16 20 COMP Compensation-Network Connection. For proper compensation, connect a suitable RC network from COMP to SGND. 17 21 SGND Signal Ground Connection 18 22 V 5V Regulator Output. Connect a minimum 2.2μF ceramic capacitor from VCC to SGND for CC stable operation. 19 23 SS Soft-Start Pin. A minimum 10nF capacitor is recommended on this pin. www.maximintegrated.com Maxim Integrated │ 9
