Yeap Andy, TI make a great Led driver, PArt Number :TLC5921 16 out puts, serial data clocked in, Drive Capability and Output Counts
80 mA (Current Sink) x 16 Bits
Constant Current Output Range
1 to 80 mA ( Current Value Setting for All Output Terminals Using External Resistor)
Constant Current Accuracy
±1% (Typ)
±4% (Max) (Maximum Error Between Bits, All Bits On)
Voltage Applied to Constant Current Output Terminal
Minimum 0.6 V (Output Current 40 mA)
Minimum 1 V (Output Current 80 mA)
Data Input
Clock Synchronized 1 Bit Serial Input
Data Output
Clock Synchronized 1 bit Serial Output (With Timing Selection)
Input/Output Signal Level...CMOS Level
Power Supply Voltage...4.5 V to 5.5V
Maximum Output Voltage...17 V (Max)
Data Transfer Rate...20 MHz (Max)
Operating Free-Air Temperature Range
-20°C to 85°C
Available in 32 Pin HTSSOP DAP Package (PD=3.9 W,
TA = 25°C)
LOD Function...LED Open Detection
(Error Signal Output at LED Disconnection)
TSD Function...Thermal Shutdown (Turn Output Off When Junction Temperature Exceeds Limit)

I use these alot the surface mount pakage they come in are a bit small 32 pin "Plastic Small Outline" and the pins are spread 16 per side.

Regards,

Kat.