Specifications

Rev. 1.0 January 2012
www.aosmd.com
Page 3 of 3
AOZ197
8
Pin Description
Part Number Pin Name Pin Function
1 VIN Input Supply Pin.
2 DPWM1
Fault and Dimming PWM Control Output for Channel 1. DPWM1 = High for LED connect.
DPWM1 = Low for LED disconnect. Connect to the gate of external NMOS switch.
3 GATE1
External Boost NMOS Gate Controller Pin for Channel 1. Connect to the gate of external
NMOS switch.
4 GND IC Ground Pin.
5 COMP1
Compensation Pin for Channel 1. COMP1 is the output of the internal error amplifier.
For loop compensation connect a RC network from COMP1 to ground.
6 OVP1
Output Voltage Protection Input Pin for Channel 1 output. Use a voltage divider from VOUT1
to sense Boost output voltage.
7 DBRT1
Digital Brightness Control Input for Channel 1. PWM dimming controls the LED brightness by
turning the LED on and off using a PWM signal. The brightness is proportional to the PWM
duty cycle applied at this pin.
8 CS1 NMOS Switch Current Sense Pin for Channel 1.
9 FB1 Feedback Input Pin for Channel 1. Connect to sense resistor at LED string.
10 ISET
LED Current Set Input Pin reference for both channels. 0.5V internal or external reference
can be used.
11 SCP
Short Circuit Protection Pin: monitors and Flags input voltage drop and over current sensing
during Fault conditions.
12 FB2 Feedback Input Pin for Channel 2. Connect to sense resistor at LED string.
13 CS2 NMOS Switch Current Sense Pin for Channel 2.
14 DBRT2
Digital Brightness Control Input for Channel 2. PWM dimming controls the LED brightness by
turning the LED on and off using a PWM signal. The brightness is proportional to the PWM
duty cycle applied at this pin.
15 OVP2
Output Voltage Protection Input Pin for Channel 2 output. Use a voltage divider from VOUT2
to sense Boost output voltage.
16 COMP2
Compensation Pin for Channel 2. COMP2 is the output of the internal error amplifier. For
loop compensation connect a RC network from COMP2 to ground.
17 GND IC Ground Pin.
18 GATE2
External Boost NMOS Gate Controller Pin for Channel 2. Connect to the gate of external
NMOS switch.
19 DPWM2
Fault and Dimming PWM control output for Channel 2. DPWM2 = High for LED connect.
DPWM2 = Low for LED disconnect. Connect to the gate of external NMOS switch.
20 FLAG NMOS Open Drain Fault Flag Output Pin. FLAG = 1 if SCP or OVP is detected.