L6728H STMicroelectronics, L6728H Datasheet - Page 5

• Manufacturer Part Number: L6728H
• Description: Voltage Mode PWM Controllers Sgl Output 300 KHz DFN-10
• Manufacturer: STMicroelectronics

Specifications of L6728H

• Number Of Outputs: Single Output
• Switching Frequency: 300 KHz
• Operating Supply Voltage: 5 V to 12 V
• Supply Current: 6 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: DFN-10
• Mounting Style: SMD/SMT
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L6728H
2
2.1
Table 2.
Pin n°
10
1
2
3
4
5
6
7
8
9
LGATE / OC
COMP / DIS
PGOOD
PHASE
UGATE
BOOT
Name
VSEN
GND
VCC
FB
Pin description and connection diagrams
Pin descriptions
Pins description
Figure 3.
HS driver supply. Connect through a capacitor (100 nF) to the floating node (LS-Drain) pin
and provide necessary bootstrap diode from VCC.
HS driver return path, current-reading and adaptive-dead-time monitor. Connect to the LS
drain to sense
adaptive-dead-time control circuitry to monitor when HS MOSFET is OFF.
HS driver output. Connect directly to HS MOSFET gate.
LGATE. LS driver output. Connect directly to LS MOSFET gate. OC. Over current threshold
set. During a short period of time following VCC rising over UVLO threshold, a 10 μA current
is sourced from this pin. Connect to GND with an R
program OC threshold. The resulting voltage at this pin is sampled and held internally as the
OC set point. Maximum programmable OC threshold is 0.55 V. A voltage greater than 0.6 V
activates an internal clamp and causes OC threshold to be set at the maximum value.
All internal references, logic and drivers are connected to this pin. Connect to the PCB ground
plane.
Device and drivers power supply. Operative range from 5 V to 12 V. Filter with at least 1 nF
MLCC to GND.
COMP. Error amplifier output. Connect with an R
control loop. DIS. The device can be disabled by pushing this pin lower than 0.75 V (typ).
Setting free the pin, the device enables again.
Error amplifier inverting input. Connect with a resistor R
Output resistor divider may be used to regulate voltages higher than the reference.
Regulated voltage sense pin for OVP and UVP protections and PGOOD. Connect to the
output regulated voltage, or to the output resistor divider if the regulated voltage is higher than
the reference.
Open drain output set free after SS has finished and pulled low when VSEN is outside the
relative window. Pull up to a voltage equal or lower than VCC. If not used it can be left
floating.
Pin connection (top view)
R
DS(on)
drop to measure the output current. This pin is also used by the
Doc ID 15725 Rev 1
L6728H
Function
Pin description and connection diagrams
F
- C
OCSET
F
// C
FB
resistor greater than 5 kΩ to
to the output regulated voltage.
P
to FB to compensate the device
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